C OM PA RA T IV E ST U D IE S IN TH E P sy c h o l o g y Ants of an d of H i gh e r A n i m al s . WA SM A N N E R IC e P l us stu p e mu s (S i m me m a q u am e , D e Ci t/ i t e E glish V e i sc f th E l ge d d r vis d b y t h A ut h o ri z d n rs o n n ar ST . L O UI S , an Mo . l , e AN D e o e F P ub i sh e d b y B 1 905 L ON D O N AN D E . f o rm i cu l aru m n im A u g u st i n . s , e a p i cu l a r u et . G e r m an , c. . ( BADE N ) , . . SAND S o p e ra 2 4, Ed i t i H E RD E R D I N B U R GH : m b a l ae n aru m , c o rp o r a A uth o r R E I B URG . . D ei , I 22 , , on d e J CO . on n . . C OP Y R I G H T 1 90 5 BY J OS E P H G U M M E R S B A C H P RI I B E C KTO LD NT NG AND B OO K ST . I MFG C O LO U S . MO . . . . P R E FA C E OM E T O TH E FI R S T E D ITI O N . ti me a g o we published an essay entitled “ I nstinct an d Intelligence i n the A nimal K ing dom exam ining in detail th e concepts of i nsti n c t and i n tel l i g en ce with their application to animals The discu ssion showed that i n tel l i g en ce i s the spiritual power o f abstraction and not the mere f aculty o f fo rm ing compl ex sense representations ; for the l aw s O f a ssociation in sense perceptions belon g to the sphere o f instinctive s ensitive li f e and n o t to spiritual i n tell i ge nce Now wh at mod ern ani m al psychol ogy term s “ ” intell igence o f animal s i s nothing but inborn instinct rai sed to a highe r l evel of per fection by the individual s sensuou s experience Thi s i n its tu rn is based o n th e very same law s Of association o f sense representations H ence there i s no reason for a scri b ing to animal s i n tell i g en ce i n th e stri ct sense I ndeed o ur reasoning led u s to t ak e a further step and we proved th at a ni mal s h ave n o i n tel l i g en ce at al l I f they we re gi fted with a spi ri tual power o f abstraction i t woul d n ecessarily b e mani fested i n their o u tward actions especially by the formation o f an arbitrary phonetic o r graphi c language A nimal s however h ave n o langu a ge ; h ence they have n o intelligence Besi des we have sh own in the same es say that th e mani festati ons of the psych ic l i fe bo th o f higher and o f l o wer animal s are to b e j udged acco rding to o n e an d t h e so me cri ti cal stan d ard The anatomical ‘ , . , , - - , . , , ’ . . , , , . , , . , , , . . , , , ' , . iii , P ref a ce to th e Fi rst E d i ti o n . d i f ference that e xists between the s ense or g ans and t he nervous system o f A r throp o ds o n th e o n e hand and Of V ert e brates o n the other i s not a su f ficie nt a p ri o r i r e ason for ascribin g intel ligence to th e latter only and d e nyin g it to th e former The proo f of these asser ti o ns form s the groundwork O f the p resent essay We shall compare more at length the psychic li fe O f the “ most intelligent A rthropods nam ely the ants with th a t of the higher V ertebrates and o f man F rom thi s “ di scu ssion we shal l learn whether th e missing l ink with which moder n evolutionists hop e to bridge over the chasm b etween the insti nct of animals and the spiritual soul of man i s t o b e looked f o r i n ants o r in the higher V ertebrates or w hether i n fact it exi sts at all B iol o gists w ill be pleased to fin d that the pre sent essay contains many new observations o n the habits o f ants and their guests , , . . ” , , . ” , , , , , . . , P R E FA CE T O TH E S E CON D ED I T I ON . HE nu merous Observations of modern scientists illustrating th e relation s betwe en the psychic l i fe Of ants an d o f higher animals have been extensively uti lized i n preparing thi s secon d edition We have pai d due regard to the Observations and experiment s publ ishe d s i nce 1 897 o n the di f ferent iation o f castes in be e hives Besid e s w e h ave turned to account the results Of a statistical chart now compl e ted extending over five ye ars and comprising all the colonies o f F ormi ca sang ui n ea i n th e neighb o rhood o f E xat en Holland Thi s ant i s the most interesting o f all Eur o pean species Thus we are abl e to publish many ne w facts o f interest i n scientific biol ogy regarding th e slave making habits o f thi s ant its metho ds o f nest construction its rel ationship to its gu e st L a i n ech i t sa and th e infl uence o f the latter in t h e di f ferenti ati o n of cast e s in an t communities Final ly tw o additional illu str a tion s of L o rn ech n sa struni osa and of it s la rv a have been added in the text , , . , , - . , , , . . - , , , . . , T R A N S L A T OR S P R E FA CE ’ . A S MA N N S ’ Instinct and Intelligence in the ” which appeared recently in A nimal K ingdom an Engli sh dress ( Herd e r S t Lou is Mo ) w as so favorably received that it has been thought advi sable to follow it up w ith this translat ion o f another e ssay by the same author T h e se tw o books supple m ent each oth e r a s may b e gathered from the frequent cross references they contain an d more especially f rom the close relationship o f th e subj ects o f which they treat T h e be st recom mend a tion o f Wasmann s biological and psychologic a l essays i s given in the following l ines o f W M Wh eel er P rof o f th e University Of “ 1 Texas : Wasm a nn in h i s numerou s writings has u ndoubtedly done mu ch at l east i n G e rmari y tow ard s the exposure o f thi s pseu do psychology ( o f B rehm Buechner an d others ) and a more r ational conc e ption ant behavior H i s long famil iarity with these of animal s and thei r gu ests has given hi m a singularly luci d insight into their activities M y o w n more l imit e d observati o ns o n ou r North A merican speci e s l ead m e to agree with hi m so far as the facts are con cerned and many Of th e inferences whi ch he has ” drawn from them A s to hi s additional rem ark I am const rained t o say however that I cannot adopt , . , , , , . , , , , . ’ , . . . , , - , . . , . , 1 “ ) Ame “ ric p N tur list The an C a om a o un d ” , N st s f XXV 1 90 1 p 808 an d V ol . , M ix ed , VI e , o . . A me ric an An t s " , in ' T ra nsl a tor s P ref a ce . either hi s psychological definitions or h i s ps y ch ogenetic ” rese rvations —w e call the critic s attention to the en d “ o f the fourth chapte r O f Instinct and I ntel ligence in ” th e A ni mal K in g dom w here P rof Wheeler s Ob j ec tions have been answered I n order to make the Engl ish translation more valuable for North A merica the author has k indly added a series o f notes and Observations o n the ant fauna o f the Unite d S tates H e h as added moreover the fi gures representin g th e No rth A merican form O f F ormi ca sangui n ea and that of its gue st X en o d usa cava Th e present work there fore i s m ore th an a translation ; it may be call e d a new edition revis ed and enlarged by Father Was m ann ’ , ’ . , . , . . , , , , , . Can i si ns Col l eg e B u ff al o N , , . Y . C ON T E N T S P re f ac e t o t h e fi r st P r e f ac e t o t h e T ran sl a t o r s ’ ed i ti o n e di ti o n se c o n d p re f a c e I N T ROD U CT ION So m e . i m o d e rn an d an c e n t t Of an s an d h i gh e vi e w s Of . t h e p sy c h i c life r CH A P T E R 1 . O M M U NI TY L I FE I N T H E A NI MA L K I N GDO M A g e n e a l v i e w Of t h e f o m s O f a n i m a l c o m m un i t i e s D i ff r t d g r s f c mm i ty li f i th i m l k i gd m C mm i t i s f b s d t s c m p r d A t s t t s t h m st p r f c t i m l s ci t i s b th si m pl d c m pl x C I . . r . o un o e Th e r en e 2 of e ee O e P lym rp h is m o o P sych ic t i s a o h u m an an n o t s t a te u o ” a 3 T h e c o m m un i t i e s t h o se o f a n t s of o a e o f o r th e of un ten a an t h i gh er Of . i . ou nt an e n a n . o u n d at o n an t h at an e . e , . st at e s an t o on e e e a r g ic f c l i s I t is an t en o , of o wi th s ffici tly cc “ e n e an e th e , in e c an f o un d at i o n s so c i al un o ee an e o . s A l tt r “ . a e bl s ci t i s i d ti f y th t ic i sti c ts an t o to e ut o ma e e en ” . e n n . w i th a n i in a l s c o m p a r e d . M t l w r i g f d g r S t i ls M t l c h ri t y f l b r d d ivisi N rsi g f t h sic k C p r t i C mm d f s Fi d li t y d b d i c i im l Bri f s m m ry i ti u ua u on c e e en e es . an o e o n o a n n “ u e a an e a en . o o . e. e ne an on o u ua . on en e a e ” n . a o a an o . so' . CH A P T E R II . WA RFA R E A N D SL A VE RY THE IN I W a r s am o n g h i g h e r F b l s d st ri s f w r b t w l tt r w p s t ls A N I MAL K I N GDO M . . a a e e an u se n o o ea e on o or a s oo , e ee n t r ps oo of a ps e . T he Co n ten ts . P AGE 2 T h e w ar l i k e xp e d i t i o n s Of Fo rmi ca T h ir s kill f sa n c ics t h e A mazo n e - . g ui n ea . vic t rs Am t s ; t h ir i bility t f th m Th m ili t ry t c t ics f th s g i l g i ) d isc ss d psych l g ic l g r ds ta t e o th e , az o n e n ua n o a a e e an ” ili t ry t h ms lv s ( F r mi c Th e m . ee d o u ne s ave a ou n o o a e e ak e r e . a o . i n th e p sy ch i c en nu e “ e a a “ life o f an t s e en ue ue e o an o on o on . e a a on ua n o e a n . a a sa n u n e a, o s e ana a e u on e e u e o e o on ue n e n ou a a e en ac . e . n e ne n e a o . o a o n e o on e rO o n un an ee a o nu e a ee n e e e o e . e au o an e ca o o n or n a o. e n o on e e x er . . e an n s e an e e or e en o an , o ne e en e na u e e an n o o n e ” a an e n e e . ” au - o o on e u n “ en o o e a , n o on n e ua e ” a e - a s u an on e o . or e o . o i d ivi d ls f y t d i ff r t ly d th s m c l f t l r i c mb t A cq ir d i d ivi d l h b i t s P rs c ti t d v f tr g s t s A t s t m b l P syc h ic i fl c f th m b rs cl y r g i c mb t f t h ir c M rk d h r is m f i d ivi d ls M r ti l sp r t s ? T h e sl v e m aki ng i n st i n cts o f Fo rm i ca sa ng ui n ea Tr d it i i s c t c mm i ti s E p i d i str ct i i m ts m d wi th s l f t gh t d b s S m i g ly ts i t lli g t pl s t ici t y f t h i s ti c t f sl v ry i F rmi th d t b t h wi th r g r d t t h sp ci s mb r g i f i t sl v s Th ts c rr c t O th t r f sl v ry i xpl t i is i th r th p m p h i m ic t m m ch ti m b t s m th i g b t w tw th Oth e r w a r s a n d a l l i an ce s o f an t s Fi gh t s b t w i gh b ri g c l i s A lli c s b t w h s ti l c l i s d th ir psyc h l g ic l xpl ti S mm ry Th e 5 th e na e mat i sm a ut o . of on e 3 T h e p r e t e n de d 4 an o u san u n ea . iy h um an t a a e “ th e ant an d e on an a e a o o an . ee n e u . a . CH A P T E R I I I . R R A NI MA L A C H IT E CT U E I N T H E I 2 . A g en e ral su r vey Of th e T h e l l ests Of an t s l a rch i t e ct ure o f a n i m a s . . ‘ 0 ri s ou f eren t 3 T he an e e o o o o o o o o e ‘ o o o o o o o o 0 o 0 0 0 0 0 0 0 0 0 0 0 ; r b i t r ry f r m s f th i r s t s N s ts f di f t sp ci s P syc h l g ic l xpl t i f t h is d i ff r c an d e V ri t y a e a O o o o . Fo rmi ca n e st s Of . sa n a ne e on O an a e o e . e. e en gu i n e a mb r f pl st ici t y i th ir f r m s V ri b l th s t s f c l y P ri d ic c h g s f st s ; d i ff r t pl c s f r si d c i d i ff r t s s s T h s p h m psych l gic lly xpl i d P w r f d pt i g th c s t r ti f t h ir st s t th s rr d i gs i r d r t s c r th m g i st h s t il i r d s H o w d o a nt s b ui l d t h e i r n e st s ? N ri gi d sys t m f p r t i ; s m i gly i t lli g t l f d t r mi t i S i t b l c si d r t i f th di f r t di ti f t mp r t r d m is t r A rc h i t c t r f b ir d s c m p r d wi t h t h t f t s ; wi th t h t f m mm ls i p ti l f b v rs a e ne e a e on o en e a on s o o on e n e o co o a ea - a e . o an an n o o e en e o ena ue on e n e en o e e a , nu e ne o . a n a e u e . e on e e a u e e oa o oun u e e ea o n e o a . an o . o u . o e en o a e c u ar o n ne a n e e . a ne e e na o on a o e e n a e o a e and o o o . t - Va 4 I N GDO M K a on e a o n ee on u e o e e . a o en n e a con e en u e a se o , n ar . Co n tents . P AGE . 5 Oth er skil l t ural on r mp rt s r li t y a a ea , o ad etc , mp l o y s g ll ri s st b l s Th gr v y r d s f a , e e a e . a . e f or o an a - a ct i v . si g A s b il d i g f E xp ri m ts R s ul t s s m m nt u u a e an a , n ri s e an d on n an o of en u e i ty o f an t s , in g ui d e d b y ir l rv spi i g w h ls ts cc r d i g t W M rsh ll L bb c k d B t h M y w th e n ” e a a ae n o u nn n as o a . an o e R DI N G B EE A g en e r a l ee - o b ri d g ch r d B xp ri m t “ The . a e. an n e ue e ne . e n s. e e d up . CH A P T E R IV . p h i d s gr fic ti ts i e . 6 Is th e b ui l di ng I t h ei r a rc h i t e c an t s e . S t ti s r a w h i ch f or p urp o ses, . N UR S I NG AND v i ew A NI MA L TH E IN . b re e d i n g i n sti n ct s Of t h e KI o f an N GDO M . i mal s Br d i g d f m ily li f i i m ls wi th r f r c t t h f pr s rv t i sp ci s T h is r l t i sh ip psyc h l gic lly xpl i d Br d i g i s ci l i s c t s Th b r d i g i st i c t f ts d p d t l ws f r g ic d v l p m t th ee n e e e a ne o 2 . a on en e en on t h e y o un g e en ee e on e o a o o ee e . an o o mo n g e an a e on u en n e n n en e o n . an t s an o on an n oo an n on a e an , on . a e o o ec o o ” e o n e e on s o a o n e . e a e e n en u a e n es ee d n e e o o ir b r e e an o th e . an se u . on a a e en a “ e an an of e an ee n e . a e en e i g i sti ct d f i t d i ff r t m i f s t t i s T h di ff r t i t i f c st s i b s d t s i fl c d b y d c ti I t r m d i t f rms b tw f m l s d w r k rs i ts d t h ir pr b b l xpl t i P d gy L m h d t h ir r l t i t A tt c h m t ts t d f t h ir b r F d m t h rs d ts A do p ti o n i n st i n c t s i n th e an i m al k i n g d o m T h ir f r q t cc rr c P sych l gic l xpl t i A ts rsi g L m h l rv D i ff r t t r t m t f th s l rv b t h i rm l s g i c l i s d i s ch c t i p d gy rsi g f gg s W M rs h ll d th f p h i d s b y t s ; i t lli g t f r si gh t f t h f t r ; A d pti c m p ris wi t h th rsi g f L m h l rv i s ti c t s i b ir d s d m mm ls R s l t s s mm d p ; l si s a a 3 n a o P syc h ic c h r c t ris t ics e e a e a a . n n an n e e ee e of a o . an Ca re an a e u sa . an ” aun . . e e nu n o ae , a u sa - e en a ae a no . an e e . nu an ” en n o o a a o e usa - e u . a u n ae u u u e o . u e is m d th pl s t ici t y f i st i ct b t h i m ls r vi w d M t h ly b i g d h i gh r f visi b l cr ti gi f t d wi th r s H m iz t i is sci tific d i j ri s t th m r l r d r f s ci t y a u t o m at an e un e e on con . T he o as o e o ec e e n nu e n . o an an on en ea o on e a n e an a e a en u n ea a . “ o o . an n es n on u o on n e u o e a n n se u a o ec o on a n o ue n e an ea on en , , e a a e an e e an an . ea on e n u ou n o o e u . e n e n on an o o a a o on e o o in an t s in the an i m ls a h um an I NT R OD U CT I ON . n i nt ti mes o b serv er s of ani mal l i fe notice d that bodily size and psychic perfection are not alw ays in direct proportion but that the 1 reverse i s not unfrequently the case Thus A ristotle declared that keenness o f perception ( rip ni s (Sta n0 6a ; more mani fest in smal ler dxp ifia a v) was o ften than i n l arger animal s N o r di d i t escape th e great S tagirite who was not only a logi cal thinker but al so a ski l ful observer that many animals o f l o w rank i n the zoologi cal scale were endowed in some way with a higher p sychi c l i fe th an the highest mammal s so much so that i ts m ani festations could b e com pared w ith human institutions only H e mentions ” especially ants an d bees among thos e bloodl es s animal s which possess a m ore intel lectual soul than 2 m any anim al s o f the other kind T he same thought was express e d by S t A ugustine o n e o f the lo ftiest We admire Chri stian minds i n the following terms : the works o f the tiny ants and bees more than the ”3 bulky form s O f whales A n d a d istingui shed modern naturali st Em il D u b oi s — Reymond has ac k nowledged VE N i n a c e , , . ' ‘ / . , , , , , , , . , , . . , , . , ck r I c 4 ( B ck r I A ris t t l s ) D p t b f d ivisi im ls i t t h s wi th d b l d d th s wi th c l r l b l d i r li ty c i ci d s wi th th t f V r t b r t s d N V r t b r t s H s s th t r m Bl dl ss A i m ls f th s w h ich h v d bl d D iv D 1 22 c 24 XLI 5 ( Mi g ) 1 “ ) “ 2 Hi , on e u e oo . ar z e an o n oo 1 9, s t. e 7 ( Be 1 2 . n o o n e . . a ea c o e a oo e o e oo e a n , . re e “ , e ” e or e o , an a e o e an on “ e c ' . ei , . , . , n . ne - e a e o e . 3 o o , e no e ’ e ss a e re . In tro ducti on 2 . “ With revere nti al aw e in the nam e o f hi s collea gues : does he ( the naturalist ) gaze at the m icroscopic speck o f nervous substance which harbors the soul Of the ant with its industry its instincts o f architecture o rder fidelity and courage S u rely i t was not without great reason that scientific Observers o f recent tim e s appl ied them selves to the most careful and detailed examination Of the li fe o f ants especi ally since the publ ication Of P ierre “ Huber s classical Rech erch es sur l es M o en rs d cs ” F o urmi s i n di g en es V ery many interesting fact s Of great value for psychologic al research have thu s been furni shed Howe ver dabblers in popular science who viewed things from th e s ta ndpoint Of “ vulgar p sychology as Wundt termed it mi sinter p re t e d these facts i n a very unscientific manner ; for they tried to draw conclusion s from them which led to the humaniz ation o f ani mal s and denied th e existence O f any e ssential diff e rence betwe e n th e p sychi c faculti es o f man and brute I t i s not so very long since Ludwi g Buechner endeavored to pro “ mote th e se i deas i n h is G ei stesl eb en d er T i e re A s i s g e n eral l v the c a se with such ( Berl in shallow elaborations Bu echner has found n o t a few imitators and pl agiari st s There fore it m ay not be out o f place to examine thes e deductions fro m th e standpoint O f critical psychology S i r John Lubbock who devoted him sel f to the study o f ant l i fe with th e accuracy o f a pro fes sional sci enti st and who carefully refrained from the 1 , , , . , , , ’ . , , , , , . ” , , . , . , , 1 Dubo ‘ Ubr is R ym “ ) - e e e di e o n d, l st r z d N is ( L ipzi g G en en s ue es e , r rk p at u e e n n en . s 1 27 . . L c tur e es by E . I n tro d ucti o n 4 . de g ree o f per fection in their social instincts and that thereby the higher animal was gradually trans formed i nto man The tenability Of this assumption w ill be di scu s sed i n the following chapters I t i s understood that in our comparative investigation w e shall be gui d e d not by the postul a tes of e volutionist th e ories but by the prin set fo rth at l e ngth in our c i p l es o f critical psychology “ former ess ay Instinct and Int e lligenc e i n th e A nimal ” K ingdom ( Herder S t Louis MO Lat e ly there has be e n inv e nted a th eory o n the p sychic li f e o f a nts wh ich i s d iam e tri cally oppos e d to the popular attempts at hum ani zation A l b B eth e “ has tri e d to se t dow n ant s a n d b ee s a s mere refl e x machin e s d e voi d ev e n of the simpl e st s e nsitive per c ep t i o n an d cognition whil st h e consi d e rs t h e i n tell i gence Of higher a nimal s to be beyond all doubt Thu s h e hoped to succ ee d i n destroying th e p a r a llel i sm established by u s b e tween the p sych ic faculti e s Of a n t s a nd those o f higher animal s from which w e had drawn the conclusion : w e do not need ant i nt ellige nce therefore neither ani mal i ntelligence B et h e s work i s Of undoubted valu e o n accou nt o f its attack o n the still wi de spread popular view s r egarding ants as i n te l l i 2 gent human beings i n m iniature H i s theory has , . . , , , , , , . , , . , , l . . , , . , , ’ . - , 1 . “ ) z sc r i b L XX 1 5 u h wir D ue r f e n e en ? ” B d en A me 1898 on n , is “ ( A . un d en rc iv h Bi r psyc h isc h Q g s mt P h y e n en f ue u al i t ae t e n e di e e a e si o l o g i c , ” , is r g r d th B t r c h t g b r d i s t t lic h l b d I mm p b lish d g i st B th ss y b y C h rl s S j o i P r m th s ( 1 0 J h g 1 899 N 486 d b y d wh t f g is dm issi b l S i m il rly th ss y b y K i i t z G rl ff B si t z di A m is I t lli g z ? i N at u w i sc h ri f t ( X I V h f tl W c h 2 ) In en , o th ” e u eu a e e n: r en d ” a e a n . ’ e s r , e n un e , a . an a a n e 20 e e ” e en a e . e a a o en sse nsc aa e an a r ue e en a - . e o e ar o en a e “ , en e on n a en e en e ” , I n tro d ucti o n 5 . al ready o n another occasion been subj ected by u s t o a thorough discu ssion B esides in a longer essay 2 especially intended f o r p rofessional z oologist s w e have since then perfected o ur former argument p roving that ants are no more mere refle x machines than dogs an d apes are i ntelligent beings The theoretical side of B eth e s psychological view s was al so noticed in the “ second edition O f o ur essay Instinct and Intelligence I n thi s i n the A nimal K ingdom ( chapters 7 and work therefore w e shall return to them but occa si o n al l y to show the fatal result s Of attempting to vindicate the intelligence o f higher animals by com l p e t e l y denyin g psychi c activities i n ant s 1 , , . , , , , . ’ ” , , , . 1 “ ) A r n ew efle x t h eo ry of an t p 577 psyc h isc h F h i gk i t ) Di Z l gi c H f t 2 6 ) p 1 34 d f d f ll wi g ) p 1 44 1 898 , 2 n . 1 5, “ a, 3 . ” ( B i ol og Ce n t ral b l . . , XV III , . ae en e oo o li fe e an an . o o e n . en ' de r A me ell. wi t h 3 is S t ttg rt pl t s en u . a e . a , 1 8 99 . CH A P TE R C OM 1 . M U N I T Y L I FE A Gen eral S urvey IN THE o f th e I . A N IM A L F o rms of K I N GD OM . A ni mal C o m m n n i ti es . HE multiplicity o f bodily shapes apparent i n an mal s i s n o t more remarkabl e than th e variety found i n thei r biological relations The maj ority o f ani mal s low e r a s well as higher l ive singly an d only ‘ temporarily j oin other indivi duals Of the same species for breeding purpos es ; no l a sting p sychi c ti e unites th e m w ith others o f thei r speci es O ther animal s l i v e i n pairs during the bre e ding season and r e main united until the young are Ol d e nough to shi ft for themselves ; thi s i s th e case w ith most birds and mammals I f the Off spring continue to remain with thei r parents fam i li e s develop into h e r ds embracin g the members Of diff e rent allie d fam il ies Thus v g wil d oxen and horses th e Chamoi s antelopes an d many apes are gregariou s animal s Whil e real gregariou sness i s base d on family ti es i n a wid e r s e nse and is mostly permanent other ani mal s flock together to form troops o r hordes to undertake j ourne ys in com mon e g o ur migratory birds i n autumn the S candinavian l em mings etc Insects too gather i nto s imilar temporary masses o f individual s o f the sam e or closely all ie d speci e s a ssuming the form o f migrating swarms M igratin g locust s are known to everybody ; but also . , , , . , . , , , . , , . . , , . , , . . , , , . , , . , 7 Ch ap ter I 8 . butterflies dragon fl i es and other insect s have b een Observed to form similar swarms But few animal species are so per fect in their social organization that the members o f the family construct thei r habitations rear their O ff spring and provide for thei r foo d in common These are what A ri stotl e call s zaa m m m a animal s leading a w el l r eg ul a t e d so c i al l i f e comparable i n a way to the social l i fe o f m an Thes e animal s are chi e fly the so —called state fo rmi ng i nsec ts th e social wasps b e es ants and termit e s With the two latter soci al l i fe i s c a rri e d to the high e st degree found in th e whole animal kingdom o f per f e ction True al so among bi rds the social w eav e rs ( P l o ceus) construct h abit a tion s i n comm on inasmuch a s they bu il d th e i r nests close toge ther and beavers unite in colonies to buil d thei r dam s when di ff er e nt pairs are i nterest e d in rai sing th e w ater level at the same spot But what i s wanting i n the a ssoci ation s Of higher ani m als i s co —Operation including some suitable divi sion o f l abor for the rearing and nourishing o f their Off spring The co m bi nati o n Of all these el ements Of social li fe i s found only amon g the social i nsects and in a prominent degree amon g an ts V iewed from the standpoint o f comparative p sy ‘ c h o l o g y social i s pre ferable b y f ar to single li fe In thi s connection o f course we mean a social li fe based o n so ci al i nsti n c ts on the laws Of sensi ti ve co g n i ti o n an d n o t merely a union caused b y the law s o f veg e ta ti ve l i f e as i s th e case with certain a n i mal co ng l o mera tes as sponges coral s polyps an d many species o f Tuni cates The bond which unites th e di ff e rent indivi dual s o f these specie s to a colony i s entirely m aterial They - , . , , . , , , , . - , , . , . , , , , , . , . , . . , , , , , , , , . , , , . Co mmuni ty L i f e i n th e A n i mal K i ng d o m 9 . live together from im mediate vegetative necessity ; for they literally grow as branches from a common trunk A s it i s an immediate v e getativ e n e cessity for plants to bri n g forth twigs l e aves and blos soms so m ere veg e ta ti v e necessity forces a colony o f S i p h o n o p h o re s to separate into di ff erent loos e ly conn e cted indivi dual s som e serving the purpose o f nutrition ( nutrient polyps ) others o f propagation ( s e xu a l polyps ) Of p e rceptio n ( perception polyps ) o f loco motion ( swi mming polyps ) and o f protection ( pro t e c ti ve polyps ) To apply to the members o f suc h “ colo n ies the term persons ( eating persons swim mi n g p e rson s as Haeck e l an d s e veral oth e r zoologists have done i s evi dently out o f pl a ce becau se thi s term implies a p sychi c independence w hich these animal s do not possess I t woul d be m ore j ustifiable to conceive th e whol e growth Of S iphonophor e s a s o n e individu a l o f i mper f e ct unity consisting O f variou s m e mbers which on account o f thei r diff erent func “ ” “ t ions can more fi tl y b e t e rme d organs than persons The similarity Of social l i fe i n the colonies o f polyps and Of ants i s very sl ight an d superficial The latt e r i n Opposition to the former consi sts of indi vi d ual s orga n ical ly separated and ind e pendent in th e i r psychi c activiti e s The members o f an ant colony are complete indivi dual s united to each other n o t by the l aw s of veg e ta ti ve g row th but by i nsti n c ti ve sy m h t h T is kin d o f o habitation mu st ind e ed be a c p y regarded a s a high e r mani festation o f psychic li fe unknown among solitar y animal s It i s tru e w ith th e state forming insect s al so the instinctive association o f the i ndivi du al s O f a colony , . , , , , , , , . , , , , . , , , . . , , . , , - . . - , , Ch ap ter 10 I . an org an i c i e veg etati ve fact namely o n the com mon descent from o n e and th e same parent ” “ calle d a qu een Honey bee s have never m ore than o ne queen in the hive ants may have several o f them The instinctive depend e nce o f be es o n thei r queen i s not so gr e at as was formerly believed M oreover in th e b e e hive the queen ha s essenti ally n o othe r function than that o f layin g e ggs ; for the rest h er attitude towards th e social activiti e s Of the colony i s enti r e ly passive ; even “ ” when the b ee s are swar ming the Ol d sovereign i s “ general l y hurrie d along by the crow d o f h e r faith ful subj ects she does not l ead th e e xpedition neither 1 does she determ ine its dire ction However a swarm o f be es deprived Of their qu ee n will disperse because the y have no common ce nter Of attraction no point Of crystallization so to say around which to for m a new colony In bee hives th e i nstinctive bond uniting queen an d w orkers i s cl oser than among ants becau se the Odor emitted by the que e n exerci ses a far mor e 2 powerful att raction o n the workers th an in the ca se i s b ased on . . , , , , . - . , - . , , , . , , , , , - . , bb é J I K i fl c mm ic t d th f ll wi g Ob s rv t i s c t lly f rc d t f t h h iv b y t h b s ld q m st f t b A lr d y sw rm i g ; s m t i m s t h b s g q b i g l ft th b h i d i t h h iv I th r c s s I b s rv d t h t th l d q h d d r pp d t th g r u d ; i spi t f th is t h b s s t tl d t q i t d i ff r t pl c s m tr d s ff r d t h m s lv s t b p t i w h ic h h w v r t h y s w h iv g i b c s th q w n l ft m issi g b g th r d f r m b ) H w p w r f l is t h is t t r c ti v ti m d b y Fr S p i l l m S I i J 1 896 O c tc h i g cl st r f sw r m i g b s f w h d r d w r k rs h d r m i d i t h c tc h i g pp r t s d c l d t fi d t h ir w y t t h w h iv L d b y th ir s s f s m ll h w v r t h y cl s t r d r d q th t lyi g d d t h g d f i gh t d ys l th gh i t b l g d h d b d i ff r t h iv t 1 ) A n a ue e n o n o e e en a o e a o e a e ee , e e e o u oo e ou o e e e n e e e a u a o e au e a n, e u ee n e e e n O e ee e ue e n e on a e e ee e a o a e , an e , e o o on e , are ee e u e en e en n e ee e ea e . on a ou an o , , o e . no e e n , r ou n a u e e e e u e e u e en o an o e a n a as a a o un , n a a ne n e e. e ne o e e a e a ou se r a n . e o e or a e un e , n , un e e o n , c an a an n , n a u a ee n a . a a e a o e o n a o , e n n on e e o e . on a o e ua e a o a e ” 2 u o un o e n . e e n a e er en o o e o ne u n a n e . . ea e ' ' a u e en e on e a e C h ap ter I 12 . bers and the consequent greater independenc e o f i nstincts i n the single work e r an ant colony bears th e stamp rather o f d emo cra ti c r ep ub l i can even so ci al i sti c institutions V iewed from the standpoint o f compara tive p sychology the community li fe o f ants i s m or e per fect than th at Of bee s o n account of the gre at e r psyc h i c i n d ep en d en ce o f e ach i ndividual It i s thi s quality O f individual indep e ndence that lends to ant states among all a ssociations Of anim a ls the g r eatest r ese m b l a n c e to the p o l i ti ca l so c i e t i es o f m a n base d o n individual intelligence and free w ill Thi s resemblance i s Of course never more th a n m ere anal og y ; but it i s th e h i g h est d eg ree o f analogy known to exi st b e tween th e social institutions o f man an d o f th e brute Nor i s th e “ ” term state appl icabl e to the social organizations Of ants o r in fact to any animal com munity in any other 1 than a m e taph ori ca l meaning ; yet i t applies more per fectly to ant states than to any other family o f i ns e cts and to insect states rather than to thos e o f any other animals A nother important r e a son why w ith ant colonie s ” “ the u se of th e term state i s comparatively m o re appropriate than with the social organizations Of other animals i s becau se col o nies O f ants are Often n ot ” m erely e nl arged fami li e s but contain al so m e mbers O f en ti rely di ff eren t speci es which are hospitabl y shel t e re d in the colony Thu s a si mpl e ant c o lony comes to b e a co mpo un d animal soci ety Th e above men ti o n e d strangers are partly ant s b elon g ing to other , , , . , , . , , . . , , , , . , , , . - . is p i t vi d A Espi s D s c i t es i m l s p 37 2 A ls K rl E v B r ( i S t l l K E v B r W W dt V rl s g W l t sch g p M sc h u d Ti rs l 2 d d p 451 1 ) On t h o . . e en au u n an en n o n a e . na . n ae . es , oe z e, ” . e e e e, un . c . , . . o an e a e “ . “ , . o . e un ” ae en ( 2e un d u ebe ’ ed . si r di ) e ne e Co mmuni ty L i f e K i ng d o m i n t h e A n i m al 13 . 1 speci es “ slaves living i n th e colony as auxiliaries o r partly they are members Of altog ether di f f e ren t o rd e rs o f insects especi a lly o f cert a in beetl e s as the gen era A temel es and L o m ech usa which are accorded a friendly reception by the ants are l icked and fed thei r larva e being reared by the ant s as i f 2 they were th e l atters own Thi s i s a special form o f communi ty li fe ( symbi osi s) found nowher e e lse throughout the animal k ingdom S ymbio si s i s only equal to real community li fe when the member s engage i n mutual psy ch i c i n terco urse Between a h ermit cr ab a n d a sea anemone that se ttl es o n the form e r s back b e tw e en a smal l fish ( Tr achi cht hys tu ni ca tus ) and a l a rg e sea nettl e harboring i t w ithin th e 3 circle Of it s tent a cl e s there i s a m utual relat ion ( m utu u se ful to both o f th e m w ithout how e ver a l i sm ) approaching any p sychic int e rcours e although the o n e instinctively looks for the oth e r There i s a simil a r relation b etwe e n ants and many o f th e i r tolerat e d guests wh i lst thei r r e lation to th e ir slaves and to thei r genuine guests attains a higher d e gree o f psycho logical intercourse and b e comes re a l co mm uni ty l i f e M o reov e r parasites hostil e intru ders and indi f ferently , , , , - , ’ . , . , . ' ’ ’ , , , , , , . , . , , z s mm g s t z t N s t r d g m isc h t K l i d A m is p rt I I f L m h th i S t i mm A t b i gr ph y ) S M ri L c h L I I li t r t r f t h s bj ct is 6 9 wh r th mb r f th m r t d Th rg l r tm t f d ts is r th r c si d r bl O K ri t isc h s V rz ic h is d t rmi t s d t r m i t p h il A rth r p d p b lish d i 1 89 4 m y m k p h il lr d y c t i s t g s t s d 1 0 9 t rm i t g s t s h vi g t h s b i l gic l r l t i s t t h ir h s t s S i c th m y w m s t v ri d sp ci s f r m l l q rt rs f t h w rl d h v b d isc v r d d s ri b d n 2 7 8 p 240 V l XI ) S ee 2 1 A n z i g r 1 s ) S e e W a m an n o on en 2 enu e a e o e . on a n ou a o o e e e c 3 O e a ua a e e e e ur . ue u a o o o en , e e o o a u a en een e 00 . e e , o . . , o . er n , e an n e ue n . e au s e an o e e u e a es ” e o o e an on n es “ en . “ en e n a u e e e e en o e a a un e u sa, ec o a e o an o o . e e e . a on e un en o nu en e e en , a ea e u o a , e r “ en , u a ” aa e a e e e ee a a er Die , . . e n an ne e e an Ch ap ter I 14 . tolerated coha b itan ts are found in th e soci ety o f many higher and lower animals They are present l ike wise i n the nests o f social wasps hornets and bumble bees ; but genui ne g uests ( S ymphiles ) which i n spite O f thei r morphological di fference are treated by their hosts a s enj oying equal rights as members Of the family are met with onl y among ants an d termites That stray chamoi s or steinbocks shoul d j oin a h erd O f goats i s evi d e ntly som e thing quite di ff erent from the fact that ants keep aphides and scale insects as thei r mi lk cows and tend even thei r eggs ; or that they feed from th e i r o w n mouths certai n speci es o f beetles which o n b eing li cked a fford the ants a special pleasu rable sensation herein t reating th e m the same a s th ey do thei r o w n comrades an d l arvae The mutu al soci al relationship whi ch i s here seen to exist between the animal s o f di ff erent sp e cies and which w e t e rm S ymphily ( c a auto.) i s by far more per feet A lth ough a s we shall show later o n i t i s inti mately connected with the i nstinct O f adoption which occu rs also am o ng higher an imal s the relation exi st ing b e tween ants on the o n e hand and thei r sl aves and genu ine guests on the other i s nevertheless a form o f per fect S ymbiosi s unparallele d among the V ertebrates . , , , , , . , , - , , , . , - . , , , , . 2 . T h e S oci a l B asi s As o f A n t S ta tes . was already indicated the ulti mate foundation It i s organic not onl y b e o f ant states i s org a n i c cau se i t i s d ue to the descent from a common o vi p arou s female but mor e especially becau se it i s con di ti o n ed i n Its essential outl ines b y pol y morph i sm , . , , , , Co mmuni ty L i f e K i ng d o m i n th e A n i ma l 15 . i n othe r words by bodily di ff erence in the indivi dual s O f a colony A n t states are organically divi ded into “ fixed group s of di ff erent castes possessin g diff erent corporal and psychi c qualities Thes e ca stes take th eir origin fro m the peculiar organic development O f ants ; they depen d o n l aw s of v eg a ti ve g ro w th no t o n th e i ntel ligence and free wil l Of individual s as do the classes o f human society By far the maj or i ty o f members o f ant colonies consist o f course O f win g “ ” less neuters which go by the name o f workers o r “ simply ants These workers are a secondary form O f th e female the Ovaries being stunted whil e brain l and instincts are all the more highly developed With many ants especially with th e genera P h ei d o l e th e workers P h ei d o l og e t o n E c i t o n C o l o b o psi s etc are again divi d e d into two mor e or l e ss strictl y sep diff e ring in bo dily structure namely a ra t e d castes workers proper an d sol diers the latter possessing a comparatively hug e head and formi dabl e j aws The W ingl ess workers and sol diers are entrust e d with the colony s soc ial w el fare ; it i s th e i r duty to buil d the nest to tend th e young to gather provi sions and to de fend th e community against hostil e invaders whil st the wing e d mal es and females atten d to the propaga A fter having been fertil ized tion o f the species which i s generally done in the ai r du ring thei r nuptial fl ight the femal es lose thei r wings and become “ queens either founding new colonies or bein g taken back by w orkers into their Old nest for oviposition called pol itical con T h e b asi s there fore o f the so — , . , . , , . , , , , , . . , , . , , , , , , . ’ , , , . , - , , . , , 1 t h an t b si mply c ll ) H c th y c w rk rs m g b s th en e o e an n o e e a on a e ee . ed “ s tu n te d ” m l f e a es, no mo r e C h ap te r I 16 . ant s IS i n fact org ani c ; it consi st s i n the descent fro m o n e fertil e female and i n the di ff eren the descendants into castes di ff e ring in t i a t i o n Of bodily and psychic qualities as a result o f the verv same specific fertility The soci al b o n d however which uni t e s the members Of an ant colony and sep arates them from other colonies o f the same species i s psych i c a n d i nsti n cti ve It i s the f eel i ng of f el l o w sh i p the i nsti n ct of so ci a l i ty resulting from common descent ; it i s moreover the i n sti n ct o f i mi ta ti o n which u rges the work e rs Of the same colony to act in concert Thi s unity and co Op e ration i s e ff ected by means of a certain se nsi l e f eel er l a ng uag e : by a touch o f thei r feel e rs thou sand s Of members o f a colony immediately r e cogni ze o n e anoth e r a s belong i n g to the same community and e ff ect ua l l v di scover the intru der ; by tap s of thei r antennae th ey exchange th ei r feeli n gs and perceptions and thu s draw the attention o f other workers Of their colony to the same work The s a me fe e ler language i s al so the means O f communication o f ants in m ixed col onies with th e ir auxiliaries o f other species and o f genuine ant guests with th e i r hosts Thi s di stinction between members Of thei r o w n colony and th os e o f others i s e ffect e d by ve rv del icate 2 o rg a ns o f sm e l l situ ated i n the ant e nnae M embers st i t uti o n o f 1 , , . , , , . , , , , - . . , . . r i th firs t pl c t h i mpl t s ci t i s w h ic h mb r c m m b rs f d i ff r t sp ci s lr d y pr v i w r k D i psyc h isc h F h i g ) W h v Z l g ic 2 6 t h is p 10 is k it d A m is th t th r f t m r ly q sti c h m ic l r fl x ( B t h c lls i ) b t f r l s si t iv p rc p t i h r h O th d L bb c k s xp ri m ts f i m ls ! L d d i t lli g c ( O th s s s i s i ct p 2 33 d f ll ) h v s h w t h t rb i t r rily c h s si g p ss w r d is q lly t f pl c is vi d t f m t h f c t t h t t w h ich h l st i t f l rs is v r th l ss r c g iz d b y h st m t s 1 e ) W e m ea n h e a e no 2 e a n a en e en o e as o ua o e e o ou s a “ a, e on. t n e o ee e s o n a e, ne “ o e e e e o e e an e a a en e o ” o ro n a e e ’ o e t a e u , ae a e an o en . as e en an an e , ” e ot n e e e su e , e a s . our a as e ” n an e e n oo o a . en en o e n , e ” on e a e e ea en ue e an . a e n o e e er e ea “ e en no e e e on en a er ne e u , o en e on , n a or an a e a an . Co mmuni ty L i f e i n th e A n i mal K i n g d om 17 . of the sam e colony have the same deli cat e nest ” and by lic k ing strangers they are able to trans o dor fer it to other insects A beetl e o f t he genus A tem el es having been l icked i n a friendly manner by but o n e ant o f a F ormi ca colony w ill be acknowledge d a s a friend by the other ants o f the same colony whil st ” “ 1 otherwi se they woul d attack i t Th e nest odor can be communicated t o m e mbers O f other colonies n o t only by l icking but al so by feeding The smell o f the 2 sa l i vary g l a n d secreti o ns thu s se e m s t o se rve ants a s “ well as bees as a means o f recognizing the citizens ” o f the same state 3 It i s no doubt downright nonsense for Buechner to put ant stat e s o n th e sam e lev e l w ith human republics much more so to consi d e r them more perfect “ than the latter A n d when modern soci ologist s t ry to establi sh thei r re forms o f human society o n such foundations we are j u stified in styling their endeavors utopian scheme s T he p romoters o f such i dea s f o r , . , , . . . , , , . , . M r si g ific c f th s liv ry gl d s cr t i s th s f r c g i ti m g t s will b f d i t h ss y m t i d m b v D i psyc h F h i gk i t d A m is p 1 6 d 97 6 O th l tt r p g s w h v ls s h w t h t i t is t m r l y th s m ll f t h s liv ry gl d s cr t i s d h ri g t b tl th t i d c s th ts t f th t c l r c iv i t f t r i t h b lic k d b y i gl t y b t i l m ts pl y d m s t b c si d r d t h r psyc h ic t h t b si d s xpl i i g t h f c t S ls I s t i c t d I t lli g c i t h i p 158 A i m l K i gd m th i t r s ti g li tt l ss y b y N L d wi g F tt rs f t O d r ) S V r l g g l d B h rrsc h r d O r d r g h i m i i h th i v ll r V g g i m B i lk p b lish d b y th L ipzi g r Bi z i t g 1 896 Li k wis N L d wi g U b r G h mp fi d g d R i c h r g d H i gb i d O ff b r g 1 899 9t h ( N t r iss p 5 54 G is t sl b d T i r p 52 ) g C g tt d M t i i pri m i t iv ll L f rm ) S v l zi c mic T ri 1 881 1 ) e an a “ a an a n e e , n 2 e r sc e or e e an ue, a en are “ o a ee a o ” n an e e an o n e en e u , on e e o o on u an n e a o an o ne . u e a as en a e n a a n n e e e e on e an . e, s n e e n no e ee . e e e n . n e un a s e er e on er e e e n en vo e . , o e e “ a u e e e un e ne e , u , un e “ u ” u . u e, . en e a “ e r uc en e n e a un n ss e en e n e e e a un un , , . “ 3 4 o u an a ” un e e en . n e aen n e en , e a n an a o un e er e e , e e a a e ” o ee o e a o en o on e e n a a e an e as o , on a e e a n n e o e a e e a e an ae . e a e on n o n e e e a e e o e a o on e o e e ee e. on e 2 en e e o no er o . a ” . ne e e, o o e n o, . . ar . s, “ e o e e ne a C hap ter 18 I . get that w ith m an class di ff er ence s re st on f ar di f f e ren t bases than di ff e rences o f caste s a mong ants With m an they are the outcome o f change able out ward conditions o f li fe or perhap s the result o f the intelligent free choice o f th e individuals concerned ; with ants however they spring directly from the hereditary organic laws o f polymo rphi sm Besi des those socialistic theori sts forget th a t among ants there exi sts perfect equal ity and fraternity betwe e n all the membe rs of a col ony f o r the v e ry rea son that these animal s are gu i ded by thei r social instincts o nly not b y i ndependent reasoning and that they th ere fore are never l iabl e a s m en unh appily o ften are egotisti cally to p re fer thei r indivi dual wel fare to the common weal I f those sociali st enthu siasts coul d trans form men into ants then they might be j ustified in pro posing ant republ ics as the i dea l pol itical condition 1 H E Ziegler i s right th e re fore i n saying With ants the social di ff erentiation i s conditio n ed by organization an d instincts and i s thu s accurately fixed and r e gulated whilst with man th e social diff e r e n t i a ti o n i s due to education and cu stom ; e xerci se only the foundation o f man s social li fe i s determined by c e rtai n social instincts its further development however i s regulated by the intellect by education and cu stom To argu e abou t man s social institutions from the relati ons e xi sting among insects woul d be c o mmi t ti ng a g ross err o r all the more so ‘ i f one shoul d consider the communisti c insect states ~ , . , , , , . , , , , , , . , . . . , , , , , ’ , , , , ’ , 1 ) p 1 86 I d ivi d G i ss . n e “ . S ee u en en , N Die at u a Oder 1 851 . ls rwiss sc h o en R . di e E af t un d L e u ck a r t , rsc h i e n un g en Th ri U b r d P lym rph is m s d d g i d N tu r A r b i t s t il di e e er so c i al d e m o k rat i sc h e e en e o e un eo u o n er e, er a " , C h ap ter I 20 . In what does the pretended p sychological superi o ri ty o f the associations o f higher animals over ant st a tes consi st ? Let u s try to clear up this question . T h e C o mm uni ti es 3 . o Co m th e H i g h er A n i mal s f f 1 Both Ziegler an d D arwi n point to the fact that th e higher mammal s e specially ap es sometimes form societies for the purpose o f receiving notice o f dange r for p roviding mutual prot e ction an d de fense for o b taining nouri shment sometimes even for united at 2 ta cks o n th e i r prey S ocietie s o f ant s h ave the very same end i n View A lthough thei r main pur pose i s to rear thei r young i n common yet those other secondary purposes are not only n o t excluded but thei r pursuit and attainment by ants reach a d e g ree of p erf ec ti o n u n eq ual ed by the above mentioned high er animal s H owever neither D arwin n o r E s pinas nor Zi egler nor in fact any modern stu dent o f animal psychology has ever succe e ded in proving that apes are co nsci o us of th ei r purp ose and there fore act with i n tel l ig en ce and that ants are w i th o u t co n sci o usn ess of purp ose and therefore acting m erel y fr o m i nsti n ct Let u s consi der more closely the di ff erent points o f compari son The higher animal s l iving in hordes ai d thei r comrades by certain call s giving warning o f danger S ome o f them e g the ch amois post “ ” regular sentinel s for th i s purpose However ant s do th e same and in a manner much more indicative pared w i th th ose A n ts o . , , , , , , ” . . , , . , , , , , , , , , . . , . . , . , , . 1 “ sc t i gl r l ) De 2 ) Z e en e . of Man e p . , . I Ch p . , 1 89 . a . 4 . , Co mmuni ty L i f e i n th e A ni mal K i ng dom 21 . intelli g ence T h e whole di ff erence l ie s in th e fact that instead o f calls the ants u se another means o f sensile communication namely thei r feelers If a “ troop o f sanguine sl avem ak e rs a s M cCo o k call s them ( F o rmi ca sang ui n ea ) approaches a nest o f the negro ant ( F o rmi ca fusca ) then the first blac k ant wh ich has noticed the foe hurries back into the nest communicates her o w n fright to the other workers by rapidly tapping them with her feelers and thu s gives a general alarm The larvae and pupae are hurried down from the higher parts o f the nest i nto the deeper galleries and chambers an d i f the foe advances as far a s these apartment s th e black ants ru n head ove r heel s through the secret openings at the Opposite side and wi th thei r precious burden climb up stalks an d bu shes to save it fro m the foe S ometimes they re sort to thi s final m eans o f escape at the first news o f danger and take to their heel s before the van gu ard o f the foe has reach ed the interior o f the nest In a similar way but a dopting di ff erent tacti cs the yellow and the b rownish black mea dow ants ( L asi us fl avi us and ni g er ) struggl e for sa fety when th ei r nest s are attacked by some F or mi ca species A s soon as the approach o f the foe i s di scovered the fact i s announced with lightning li k e rapi dity throughou t th e colony by rapi d strokes o f the feelers The larvae an d pupae th e winge d males and the q ueens are carried t o the lowest recesses o f the nest and the avenu es to it are hastily blocke d up with earth to prevent the ene my s advance Whilst the small L asi us i s constantly closin g up the approaches to the interior o f th e nest with b its o f earth such o f th e f o e of . , , . , , , , , , . , , , . , . , , - , . , - . , , ’ . , C h ap ter 22 I . as have ventured too far are seized and k illed by crow ds of the assailed I f with higher animals i t i s a mar k o f intell igence “ to utilize the senses o f al l for the protection o f the ” commonwealth the same must be s a i d o f ants and in a more perfect d e gre e T h e p o sting o f s e ntinel s for the protection o f th e community may be observed with th e se social ins e cts j u st as well and e ven better than with th e social apes In a nest o f F o r mi ca san g ui n ea compri sing four species o f slav e s ( or auxil f aries ) namely F f usca r n fi b a r b i s r ufa and pra te nsi s which i s und e r my Observation f o r many years I can veri fy thi s fact every day We subj oin a diagram o f thi s observati on n e st as i t w ill o ften be referred to i n the sequel The main nest and its annex are made o f glass plates in wooden frames The space between the two plates i n each nest i s partl y fill e d with earth their vertical distance being from 1 0 to 1 2 millim e ters so that th e a n ts have freedom o f motion to perform thei r work withou t being abl e to scre e n themselves from ob servation The u pper glass plate i s generally co v ere d w ith a black cloth ; for i f light were permitted to enter the ants woul d coat the lower sur fa ce o f th e glass with earth i n o rder to darken th e i n te ri o r o f the nest By means o f glas s tubes the main nest and its anne x are put i n communication with each other and with the oth e r parts o f the nest which are like wi se o f glass ( S e e diagram ) I n the main nest whi ch corresponds to the interio r o f an ord inary ant nest the m aj ority o f t h e ants are t o be found w ith thei r queens their l arvae pupa e and , . , , . , . , , . , , , , . , . . , , . , ' . , . . , , , , C h ap ter 24 1 . gu ests In the front nest we see generally a number o f ant s basking in the sun o r engaging in diff e r e nt la b ors In the top nest a small nu mber o f sa ng ui n ea r ufa a n d pra t ensi s a re u sually found eith e r on guard o r wait ing for the fl ies or other food which I occasionally th row i n In the glass bulb of t h e feeding tub e even i f it happens to contain no sugar o r honey there are a l ways o ne or tw o ant s mostly f usca o r r uli b a rb i s which have a special liking for thi s d e part m ent Even on the dumping grounds wh ither the ants carry thei r dead there are a s a rule a few ants to be found remaining im movabl e and watching for any susp iciou s circumstance i n th e n e st or in its vicinity O n M arch 2 6 1 896 from morning till eve n ing o n e F f usca and o n e F prat ensi s w e re post e d in th e re fuse nest ; o n M arch 2 7 at 7 a m two F pra t en si s ; at 1 0 a m two F sa ng u i n ea t ook the i r pl ac On M arch 2 8 i n th e forenoon o n e sa ng ui n ea was o n guard which h avi n g b e en taken o ut by m e and confi n e d was soon a fter replaced b y anoth er O n March 2 9 th e sa ng ui n ea for the rest o f th e day whol e day o n e sa ng ui n ea ; on M arch 30 at a m t w o f usca ; when at 8 a m I ha d taken out and con fined o n e o f th e two I found th at within the Space o f hal f an hou r another f usca had taken its place where upon both remained there during the whol e o f the forenoon etc O nly durin g winter a fter I had com l emptied the re fu se nest and l e ft it i n the l t e e y p same condition for a long time no ant s w ere seen there for several we e ks because thi s part o f thei r nest was n o longer of any vital interes t to them and b ecause the cool temperature kept them in the mai n . . , , . , , , , . , , , , , . , , . . . , e . . . . . , . , , . . , . . , , , , . , , , . , Communi ty L i f e i n K i ng d o m th e A n i m a l 25 . est and i n its immediate vicinity I t can hardly b e maintained that thi s posting o f sentinel s in the di f f e re n t parts o f th e nest wa s m erely d ue to po l y m orph i sm ; for th e cognitive an d appetitive powers o f the singl e indivi dual ants o f those five species in various ways take a promin e nt part i n i t A s we shall show herea fter th e same Obta ins i n oth er form s o f the division o f l a b or in ant states “ S ocial animals per form many littl e services for each other ; horses nibble an d cows lick e ach oth e r wherever they feel an itch ing ; monkeys hunt for ” each other s external parasites etc Thus Zi egler rep roduce s the statement s o f Ch D a rw in But ant s o f th e sam e colony are quite a s serviceable to each oth e r Whoever has kept ants in suitably arrange d nests o f observation where th ey fe e l com fortable and “ ” at home can observe such acts o f charity a hundr e d times a day Every time I gently li ft the b lack cloth which protects th e upper glas s plate o f the main nest from th e rays o f the sun I witness o n e o r more o f th e se lovely scenes Ju st now a worker o f F san i u n ea i s lying immovable stretched o n her s i de whilst g some of the companions are wash ing her ; a sang ui n ea a f usca and a rufi b ar b i s per form th i s work and l ic k her care full y whil st she continues immovabl e ; then they turn h e r aroun d and lick her j u st a s care fully o n the other si de A fter hal f a minute the light which floods the nest interrupts the per formance and they fl ee to some darker spot th e patient soon following thei r example A l l th e wor k ers o f each o f the five ant specie s l iving in my mi xe d col ony without d i st i n c ti on render these services o f cleanl iness to on e another n . . , . , ’ . , . . . , , , . , . . , , , , , . , , . . C h ap ter I 26 S ometime s one . of the domi nant sometimes o ne of th e e nslaved species i s the recipient no di stinction being made between masters and slaves i n performing these o ffi ces Ju st as with cows in licking each other so with ants th e performance o f this service generally cau s e s no less satis faction to the active than to the passive partner and when apes loo k for each other s parasites we must in order to arrive at a corr e ct p sychological “ ” appr e ciation o f such kind O f fices not overlook the fa ct that ape s devou r with gr e at r e lish the parasites di scovered i n the fur o f th e i r comrad e A s rega rds these mutual cleaning services ant s and the higher social animal s are pretty much on a par The only di ff er e nc e i s that with ants they occur much o ft e ner than w ith th e latter I n both they pro c eed in th e first place from the d esi r e f o r cl ean l i n ess 1 which i s no doubt o f an instinctive nature I n th e second place they are due to the instinctive m utual a tta ch me n t between the members o f ani mal as socia tions The fact that ants clean a dust covered com ” panion by care fully bru shing her down w ith thei r mandibl es and l icking her with th e i r tongues when view ed from the point o f comparative p sychology finds its explanation i n the same psychic motives a s “ when apes a fter having rushed through a thorny brake will examine each other s fu r and extract every ” thorn o r burr To l ick o ff the du st is by i tsel f not more agreeable for ants ; than i t is f o r monkeys to extract the thorns With ants the mutual attachment o f nest m ates , , . , , ’ , , , , , . , . , . , , , . , , - . , , , ’ , . , , . 1 2d ) S e e B al l i o n cd . , zs Ba a , “ , 1 895 . D e l m sti nc t d e l a pr pr eté ch ez o l es an i maux , Ch ap ter I 28 . recovered by the ne xt day whilst without nursin g she woul d probably have p e ri shed as i s g enerally the case w ith ants paralyzed by poison I f there for e on account o f this nursing Lub bock an d Romanes ascribe to ants a certain degree o f “ care and tendernes s lavi shed on thei r sick and wounded companions they are right i n so far as those actions are due to instinctive impul ses and n o t to the consciou s a ff ections o f rational beings Fo r comparing the associations o f ants w ith those o f higher anim a l s it may at a n y rate be o f particular interest to no t ice th a t such acts occur al so among ants notwithstanding th e i r hi ghly chol eri c t e mperament “ Yet social animal s al so render more important servi ces to o n e another ; thus wolv e s an d some other beast s o f prey hunt i n packs and ai d o n e another in attacking thei r victims The H amadryas baboons turn ov e r stones to find insects etc and when they come to a large o n e a s many as can stand round turn it over together and share th e booty S oci al animals ” mutually defend each other Thi s quotation from “ ” D escent o f M a n cannot j u sti fy Ziegl er D arwin s any m ore than hi s former arguments in concluding that th e community li fe o f wil d cattle baboons and other mam mal s i s more cl osely related to the social organi sms o f man than that o f ants O n the contrary th e mani festations o f social li fe recorded above occur w ith ants e ven i n f a r g reater perfecti o n A nt s too hunt in company especially the so called sanguine sl avem ak ers ( F sang ui n ea an d rubi cund a ) th e red A maz on ants ( P o l yerg us r uf escen s l uci d us an d b revi ceps) an d all the spec i es b el o n gi n g to th e , , . , , , ” , , . , , , , . , . . , , , . ’ , , , . , . - , , , , . , , Co mmuni ty L i f e i n th e A n i mal K i ng d o m . 29 and A n omma These are the dreaded l e gionary ants and driver ants o f tropical A merica and A frica Th e mi li ta ry expeditions o f F sang ui n ea are generally undertaken in small divi sions o f from twenty to fi fty workers with the purpos e not only of robbing the neuter pupae o f the slave speci e s ( F fusca an d ru fi ba rb i s) but o ften al so o f pillagi n g the nests o f smaller ants b e longing to the genus L asi us the larvae pupae and w inged individual s o f which a re carried o ff to be devoured D uring the time o f the nuptial fl ight o f L asi us n i g er many san g ui n ea colonies are hunting i n the vicinity o f their nest fo r the heavy L asi us females w hich drop to the ground Then either singly o r with united fo rces th e s e rob b ers pul l thei r victim s into th e i r stronghol ds where they are mercilessly slaughtered O n the aft e r noon o f A ugu st 2 4 1 888 I witnessed such a typical hunting expedition o f several sa ngi n ea coloni e s n e ar E xat en ( Holland ) on the outskirts o f a fir planta tion Th e road passing the nests was covered far and wi de with sang ui n eas rushing upon every L asi us femal e that d ropped from the ai r as upon a welcom e booty W ithin the space o f an hour I counted more than one hundred females o f L asi us n i g er that fell victi ms to th e hunters The indivi dual initiative o f ants i s mani fested on such occasions in the same degree a s with the higher mammal s ; whilst concerted action and suitabl e co operation reach even greater per fection than with the l atter A t any tim e a troop o f o ur common re d backed hill ants ( F rufa ) may be seen o n some forest path w ith combined forces dra ggi n g to their home a D oryl i de g enera E ci to n . . . , , . , , . , . , . , , , . , . . - . . , C h ap ter I ‘ 30 . l arge heavy dung be etle ( G eo trupes typh o eus) ; o r a number o f them are hauling to the n e st a large beam to o ur eyes it i s but a broken twig— which i s more than fi fty times the weigh t o f any single an t ! S ome pull i n front other s pu sh from behind and even i f th e latt e r for a few seconds pull in the w rong direction they soon notice it and o ff it goes i n th e right direction to the nest O n A pril 2 5 1 897 I observ e d in th e neighborhoo d o f a pratensi s nest near E x at en two workers dragging toge ther a beetle o f the genus Cal a th us towards th e ir hill ; th e y w e nt at a double quick w ithou t hindrance o n either si de both ants run ning backwards with equal speed The mode o f actin g in concert i s di ff erent with di ff erent sp e cies o f ants A mong o ur F o r mi ca species it reaches its highest de gree of development with the hill ants ( F rufa and pra tensi s) the initiative o f the singl e ants bearing rather a secondary part The sangu ine sl avem ak e r ( F sang ui n ea ) however whi ch i s able t o proceed n n i ti s vi ri ons wherever it seem s suit abl e com bin e s with thi s power a r e markable degree of i n d i vi d ual i n i ti a ti ve similar to that notice d in dogs apes and other higher animal s I t i s o f special interest to watch the co operation and divi sion o f l abor o f di ff e rent species in mi x ed In my above mentioned observation c o l o n i es o f ants nest which contains besides F sang ui n ea four other F o rmi ca species a s auxiliaries these five species h ave divided the work nec e s sary f o r the wel fare o f the communi ty so as to give each speci es exactly the share corresponding most to its instinctive preferences Thi s divi sion of la bo r however i s neither mechani cally - , , , , , . , , , , , . . . , . . , , , , , . , - . . , , , . , , Lif e i n Co mmuni ty th e A n i mal K i ng d o m 31 . defined nor confined withi n the cast iron rules estab l i sh e d by the specific character o f each ant b ut the workers o f o n e species wi ll at least to some degr e e take part in the work o f any other species Thus e g the rearing o f the youn g in the m ain nest ( see p 2 3 ) i s chiefly attended to by the san g ui n eas themsel v e s but all the four auxiliary species j oin i n the same work I n the glas s bulb o f the feeding tube containing the sugar the greater number o f vis itors consi st s o f f usca or rnfi barbi s filling their crop s by l icking up sugar or honey with wh ich they hurry to feed th e i r comp anions in the other pa rt s o f the nest S a ng ui n e a mi f a an d pratensi s often pre fer to carry the grains o f ” sugar in the lump from the feeding tube s to the t o p nest mani festing agai n various i n dividu a l di ff ere n ces in thei r mode of action quite ind e pend e nt o f th e ir specific character S o metimes the lump o f sugar i s car r i e d only a s far as y ( see di agr a m o n p 2 3) to the top o f the tube whence it i s transported by other ant s gen e rally however it i s i mmediat e ly brought ( b e yond x ) to the front nest where it i s carried to the bottom in thei r mand ibles o r el se but rathe r seldom it i s simply dropped from a considerabl e height This I observed quite often w ith sang ui n ea mor e rarely with pra tensi s When I introduce a large fl y o r some other live victim into the front nest i t is mostly sangui n ea and m fi bar bi s that dart upon it furiou sly whil st rufa and pra ten si s mani fest o n such occasions remarkable skill and perseverance in hol ding down the struggling and fl uttering victim The sangui n ea with thei r powerful mandibles atten d chiefly to the di s memberi ng o f thei r pre y whilst th e conve y ance o f the lar g er pieces - , , . . . . , . , , . , ” , , . . , , , , , , , . , . , , . , C hap ter I 32 f ru a o r sa ng ui n ea the nest i s general ly done b y of i nto the inner parts . . It was of special i ntere st to w atch the behavior o f m y ants when a new indivi dual o f the beetle L o m ech nsa st rum o sa which lives w ith F sang ui n ea as a genuine guest was i ntroduced into th e top nest A t fi rst a s long a s there w ere no rufa and pra tensi s in the nest as auxiliaries he was i f not descendi n g into the mai n nest himsel f taken at last by a sa ng ui n ea and carrie d dow n i n spite o f hi s obstin ate p a ssive resist ance Later o n i t wa s gener a lly r ufa and pratensi s th at transported the guest who attract e d thei r attention i n a rem a rkable degree O nce a r nf a happened to be alone i n the to p nest an d for a l o ng ti me was trying i n vain to get hol d o f o n e o f the two L o mech n sas happening to be th e re when all at once sh e ran down to the front nest S carc e l y more than three seconds had elapsed before sh e returned with four other rnf as which sh e h ad called to her as sistance Now th e five set to work with u nited e ff orts r nf a s i mmediat e ly to rai se the L o me ch n sas e a ch o f which was th e n car 1 rie d dow n to th e main nest by o n e o f the ants I f similar scenes ha d been w itnessed in a society form ed o f d i ff erent sp ecie s o f higher animal s w e could not help admiring th e harmoniou s co operation and the suitabl e but by n o m e ans mechanical divi sion o f labor However it i s n o t the higher ani mal s but an ts th at act in thi s w ay and in order t o save the pretende d intelligence of the former ants are classed as i n , . , . , , , , , , . . , . . , . , - . , , , , , , 1 wi ll A me ) A mo be is cc r a e f o un d u at e in o ur e on th e p w r o e scrip ti l st m f th ss y D i psyc h isch S t t t g rt 26 t h iss ts c mmu ic t i i de e on a “ , o of o n a e a - u on a n an , . i en t o n e d en e u e, en ch pt r a r o b s rv t i e a on Fae h i gk e i t en d er 63 if i n t h e p . . Co mmuni ty L i f e sti n cti ve a ut o mat o ns, i n th e A n i mal K i ng d o m 33 . even as unperceptive or “ r efl ex ma chi n es Yet neith e r in ants no r i n any other animal s are co operation an d divi sion o f l a bor such as to b e come m u tual i n di vi d u al assi sta n c e as i s th e case with man The same obj ect attract s the attention of several indi vi d ual s an d leads them to busy th e m selves about i t each i n its o w n way Working i n company i s du e partly to the similarity o f instinctive di spositi o n s i n t h e singl e ants partly to th e instinct o f imi tation H v Ih e ri n g r e fers to thi s i n the case o f the Brazili a n l e a f cutti n g ants ( A tta ) an d has pointed out the psycho logical importance o f thi s di ff er e nce as it exists 1 betw e en societies o f anima l s and man Everybody knows th a t not only the higher mam mal s but also the social insect s u n i te i n d efen di ng thei r com munity and esp e cially thei r young To be thor oughly convinced o f this fact you n e ed but st ep o n a wasps nest o r sit dow n on an ant hill I nd ee d the “ ” per fect unity an d heroi c self sac ri fi c e which social inse ct s and in p a rti cul a r most ant s d ispl a y i n de f e nd i ng their n e sts an d th e ir o ff spring are si mply un sur ” Thi s un se l fi sh n e ss p assed by any o th er a n i m al “ ” thi s spirit o f sacrific e and motherly love i n ani mal s will be r e ferr e d to in particular wh e n we come t o speak o f th e bre e ding an d nursing instincts Higher gregarious animals e g bi so n s or baboons do not in d e fending th e community against a common foe de fend als o the indivi dual s a s such Wh en a hunter lying i n ambush has kill e d one o f the herd th e , , - , . , , . . , . . , . . ’ . , - . , , . . , . , , . , 1 ) “ D i e Ame is l g isc h Z i t sc h ri f t o e 3 e en ” , f vor Ri o G 1 894 , 3 d iss r an d e u e, p . S ul , do 34 6 . ” in B rli r E e ne n t o mo C h ap ter 34 1 . other b i sons generally take an inqui sitive sni ff at the corpse but they m ake no assault on the foe for the s ake o f a woun ded or dead companion Wolves are far more uncerem o nious Instead o f d evi sing plans for revenge they devou r their dead or wounded “ ” brother A nts when engaged in common def e ns e ai m at defending the i ndivi dual o f th e colony j ust a s l ittle as do th e higher animal s A n assailed ant 15 never de fended by her companion s for he r o w n sake They rush upon the foe only because they see i n him a common danger an d because thei r warl ike spirit has been arous ed Thi s wa s n o ticed by Forel an d Lub bock and I can only confirm i t There fore neither high e r animal s nor ants when e ither at work or in b attle mani fest a n yth ing l ike i ndivi dual assi stance i n the h uman sense o f the word “ A l l animal s livin g in a body wh ich de fend them selves o r attack thei r enemies i n concert must indeed be in some degree fai th ful to one anothe r and thos e that fol low a l eader must be in some degree o b edi en t When the baboon s i n A byssinia pl under a garden they sil ently foll ow thei r leader and i f an i mprudent young animal makes a noi se he receives a slap from the others to teach him silence an d obedience Examples p er fectly s imilar to th e o n e j ust m en , . . , . , , . . , , . . , , , , , 1 . , , . , , . i st c s f i divi d l ssis t c i th l gi ry N t r list i Nic r gu h m t m r c rd d by B l t ( Th t Ec i t sily xpl i d b y t h f c t t h t t h s m i g t 2d d 1 88 8 p l g t h ir s t r ggli g c m p i s is f t i g t k t s t ri d t c s i m i gr t i s f E r p F r mi c sp ci s T h r f r t h r th is r s w h y w sh l d cr d i t t h E ci t wi th h i gh r sym p t h y th r ts i s th R m s d s ( A im l f t h ir c m p I t lli g c 6 th d p T h is c s is pr f f sym p th y b t f t h i s t i c t f s ci b l ss m r ly m i f st ti 1 pr ) T he c . , , an n e no or e e a e o on a n o en a e, ” an c e a . , on e an e an o o o , n n o a e as o o a a an o n e a, a a e , on a e ra e as o e oe o oo . en e e e e o e, . an e en e e n a o no a e e n n a a o ns an . a u e e e an e e a e u o a a ne e ou an o n e e a on ” ua n o e ea o e ea o n e n e a re e a e o e . an n a u a on an e t e n de d “ a “ a n a , u Ch ap ter 36 7 . course no t so prom inent with ants whose q ueen i s much l ess o f a center for the instinctive acti vi ties o f the workers With ants it i s j u st the workers that by th e i r re stl e s s activity and the r e mark abl e display o f individual initiative are most power fully stimulating th e i n stincts o f th e i r companions to imitation and thereby to actual co operation in a given w ork The only di ff erence b e tw e en the babo ons describe d by D arwin and o ur a n ts i s that with the form er the instinctive com munic a tion between the singl e i ndivi du al s of a troop i s e ff ected mostly through c a lls with the latt e r how e ver through taps o f th e feelers But both sometimes resort to more drastic “ gestures to supplement th e i r means o f co mm un i ca ” tion I f an excited F sang ui n ea o r fusca can not succeed by taps o f h e r feelers i n i nducing a companion to j oi n h er work she sometimes s e izes h e r by the man d i b l e s o r by a leg and simply drags h e r to the obj ect which had first attr a cte d her o w n attenti o n I n the sam e w av an ant often protect s her com rade s from a threaten ing danger first notic e d by h e r I n my observation nests I repeatedly noticed some F sa n g ui n ea o r f usca by taps o f her feele rs o r some other more drastic measu r e s warning th ei r companions to “ be o n thei r guard When e g I took away th e glass tube connecting th e feeding bulb with the to p nest “ and cau ght a few o f the sent i ( see di agram p ” nel s that i nstantly sallied forth from the opening o f the top nest r e ady to fight I o ften remarked some ants that w ere posted near the Opening o f the to p nest approaching the others tapping them w ith their feelers as a dan g er si gnal and even getting hol d o f o n e that , , . , - , . , , , , . . . , . . . , ” , . . . , . , , , , , , Co mmuni ty 37 Li f e i n th e A ni mal K i ng d om . about to run out and pull i ng h er back from the dangerou s spot To interpret such p sychic mani festa “ tions i n higher ani mal s as intel ligent actions i s evi d en tl y incons istent w ith d enying to ants an equal or ” “ even higher degree o f indivi dual intelligence Cri t i c a l psycholo g y w ill regard such occurrences i n ants as well as i n higher animal s merely a s asso ci ati ons of se nsi l e r epresen ta ti o n s a n d i mpul ses which must be classed as i nsti n cti ve sensati on an d not as i n tel l i g en t 1 Th e social instincts of animal s which in th o ug h t thei r actual use are variously influenced an d ruled by i ndividual s e nse exp e ri e nce perfectly expl a i n all the “ ” “ ” ” “ app e aranc e s o f fidel ity obedi e nc e caution etc which occur w ith state f o rm i n g i n sec ts not i n a lower b ut r a th e r in a higher de g ree than w ith apes an d other mammal s To credit higher animal s w ith quasi —human i ntellig e nce i s there fore t o humanize animal s i n a manner e qually arbitrary an d inconsi stent To su m up the resu l ts o f o ur comparative study on the social li fe of ants and o f higher animal s The associations o f apes and o f higher V e rtebrates are b a sed on so ci al i nsti n cts which l ead them to co Operate for mutual protection and de fense and partly too for the procuring o f food Thi s co op e ration i s mor e o r l ess power ful ly influ e nced an d vari e d in its m an i f e s t at i o n s according to th e sensil e e xperi e nces an d a ff ec tions o f di ff erent indivi dual s Exactly the same mode but o f a still more perfect sui ta bl e o f c o op e r ation and vari abl e nature we observe al so in o u t sta tes With these animals to o it i s founded o n so ci al was , . ” . , , , . , , . , , , ' - , . , , . . - , , , , - . . - , , , . , , , 1 ( ) See H rd r e e , St I s t i ct L is “ . n n ou , an d e I t lli g c i sp ci lly Ch p III n e e a en e a th e n . . i l K i gd A n ma n o m Ch ap ter 38 I . which corresponding to thei r or g anic poly morphi sm are diff erent i n di ff erent classes ( castes ) o f the state A s regards the application o f the sensile experiences an d aff ection s o f in divi duals there exi sts within th e range o f these cl as ses a very g reat i nd e r e e n i ab l en ess o f i ndividual action which n d c and a e v p w ith several ant species e g the sangu ine sl avemaker ( F sang ui n ea ) i s scarcely in ferior to that observed a mongst higher V ertebrates Besi des the perf ec ti o n o f so ci al c o opera ti o n o f higher mammal s i s far from equ a ling that o f ants ; f o r w ith the l atte r it extend s not only to protect ion de fense a nd hunti n g but al so to construction o f thei r dwellings to the rearing o f the “ young and t o the support o f all the m embe rs o f the ” st ate by comparatively few indivi duals goi n g by turn s i n quest o f foo d an d supplying the com munity with provi sions N o th i ng o f the kind i s known o f ape s o r oth e r higher ani mal s The pro vi di ng of fo o d in par t i c ul a r varies greatly with t h e di ff erent kinds of ant 5 “ it embraces cattle herding ( the keeping o f aph ides ) hunting ( robbing o f insects in particular robbing o f th e pupae o f other ants ) agriculture ( gra i n gathering ants ) horticulture ( ants rai sing fungi ) etc N o r are th e m ilitary expedition s o f several ant sp e cies under tak e n merely from want o f food but al so for the sake o f making slaves the ravi sh ed pupae o f workers of other ant speci es b e ing reared as m embers o f their ow n state Th rough th i s suitabl e incorporation o f outsi ders into thei r o w n colony the community li fe o f “ ants in th e mi xed col o ni es reache s a qua s i m tel l i gen t universality which i s vainly sough t for among highe r ani mal s The same universal ity i s mani fested al so by i nsti n cts, , , . , , . , . . , , . , - , , , , , . . , ! , , , , , . , , . ” - , . Co mmun i ty L i f e i n th e A n i m a l K i ng d o m . 39 the fact that many ant species treat like mem bers o f their o w n family even di ff er e nt orders o f insects namely the beetles o f the genera A tem el es L o mech usa “ X e n o d usa etc which are known a s g en ui n e an t ” and that they even tend and rear thei r young g uests as i f they were thei r own I t must therefore be conceded that the co mmunity li fe amon g ants i s mor e dev e loped and more perfect than that am on g apes an d other higher animal s h en ce , , , . , , , , . , , , f ro m th e po i n t m m un i ti es ani mal soci eti es th e co . f of o vi ew a n ts mpara ti ve psych o l ogy represen t th e m ost perf e ct o f o f co , CH A P TE R W A RS S LA V E R Y I N T H E AND 1 . II Wars A . N I M A L K I N GDO M . A m o ng H i g h er A n i mals . O D E RN evolutionists represent the social l i fe among higher V e rtebrates with the ai m o f mak in g i t the main support o f the bri dge spanning the chas m between man and the brute Thus Ziegler concl udes hi s description by a p sychological parallel i n which j ust as D arwin did h e tri e s to establi sh th e gr e atest possibl e si milarity between the social li fe o f animals an d o f man Let u s ex amine thi s evol ution i st i c attempt i n the l ight o f scientific p sychology “ Ther e exists th eref o re a mon g ani S ays Ziegl e r mal s a social community li fe sim ilar to what we m ee t among the hordes and tribes o f uncivilized nations Even wars w hich have taken pl ace among the hordes and tribes o f the human race since prehi stori c t i mes have thei r counterparts in the animal worl d a s i s proved by the following exampl e recorded by D arwin “ ‘ B reh m states on authority o f the well known travel er S ch i mp er that in A byssinia when the baboons belonging to one species descen d i n troop s from the mountains to plunder the fiel ds they sometimes encounter troop s o f another speci e s an d then a fight ensues ; the g el adas roll down great stone s whi ch th e h am adryas t ry to avoi d and then both species m aking a great uproar ru sh furiou sly against each other ” H ow far th e th erefore which shoul d connect . , , , , . . , , . , , , . - , , , , , ’ . , , 40 Wars and Sl avery i n th e A n i mal K i ng d o m . the social li fe o f animals and o f m an i s support ed by facts has been show n i n the preceding chapter Even i n high e r mammals i ndividual s o f social communiti e s co operate merely as f ar as th ei r so ci al i nsti n c ts g ui d ed In man by i n di vi d ual sensi l e experi en ce wi ll al l ow how ever comm unity li fe is due to social i nstincts , . , - . , , as fo un da ti on t o i ts m en t t o th e b ut i n i ts perf ect d evel op d eter mi n a ti o n o f i n di i n tel l i g en t fr ee sel f— o n ly, , vi d ual s Ziegler and D arwi n are fa r from h aving furni shed the proo f that the latter element occurs also i n higher animal s O r do they perhap s think that the wars which hordes o f apes wage against each other contain thi s proo f ? Let u s see In the above description it i s stated that the baboons roll down stones at thei r enemies i n ten ti o n al l y and thus a s it were us e th e sto n es a s weapons as e g in 1 80 9 the Tyrol e se occasionally di d in their struggle for liberty against the French and Bavarians But regarding apes the statement i s a myth P e ch uel Loesche corr e cted the passage in the third edition of “ ” ” “ “ B reh m s Ti erl eben We are tol d he writes that apes de fen d themselves w ith broken branches and i t i s pr e tty general ly assum ed that they hurl down o n thei r opponent s stones fruits pi eces o f woo d and other obj ects This belief i s probably due altogether to i n accurate o bserva ti o n 1 Its ori ginato rs and abettors have perhaps seen only what they from various . , . . , , , , . . , . , . ’ . , , , , , . . , M r P h l L sc h w ll w d t t s bj c t t h 3d d f B h m Ti rl b wh ic h h r vis d t th r gh psyc h l gic l r visi A l th gh s v r l f t h m s t ff siv t p ss g s w r c rr c t d p c li r s t yl h mi tt d y t B h m ch g d ; h c t p ssi b ly r f r i lly h m i m g t h fr m i t ti br t cri t icis m f th is w rk i N t ur u d O ff b ru g S X XXV II 5 70 1 u o o a si c r ly r gr ) We n e e u e o o e an e e e . e e ou a e e , a o . a e an n o e ee o et on or o . e e ou e e o s “ . o ec . ’ re e e th at , a n o ue re e e a ’ s n en o n “ as n o e en, e e oe - a o e e u u n ~ e e o o o e a o , en as e a ona a e no an z en a e n ” , C hap ter II 42 . accounts supposed to be the fact not what took place i n reality A p e s living i n tr e es in wanton playfulness break o ff w ithered b ranches by j umping o n th em by snapping and shaking the m but they do n o t throw them at a person who stands below N e ither do they th r o w fruits o r other obj ects which th e y hold in th e ir hands ; they rather drop them quit e naturally o n being frightened o r put to flight M or e ov e r baboons among which I was able to observ e especially the tsch akmas o ft e n watch ing hundreds of them very c a r e ful ly nev e r thi n k of throwing down ston e s from th e i r rocky eleva tions at their pursuers It i s tru e from the place where they happen to be stones sometime s roll o r fall down but m er e ly by chance and also at times wh e n no enemy i s in sight Tog e ther with my wi fe who derive d great pl easure from watching the b ehavior o f th e baboons — th e y w ere often th e only living beings and ve ry noi sy at that i n th e rocky deserts of S outh western A frica — I have minutely stu died their doings precisely on thi s hea d to convince mysel f whether they actually thro w Th ey assur edly d o n o t What l ight i s throw n by the se critical obse rv ations “ ” of P e ch uel Loesche o n the indivi dual intel ligence o f ape s so highly pri zed by modern evolution ? Ligh t enough indee d but extremely compromi sing f o r that th e ory I n spite o f thei r highly developed brain which in anatomical structu re bears the closest resembl ance to the human brai n apes are nevertheless unable to draw even the si mpl est co n cl usi o n s which might lea d them to the u se o f branches an d stones as w eapo ns The spi der w eaving its ingeniou s web to ensnare its o r castin g o ut silk y th reads t o entan g le its vic re y p , . , , , . . , , , , . , , , , . , , , , , . . - , , . , , , . , C h ap ter II 44 . proved unsuccess ful Even the most sava g e nations employ tool s and weap o ns o f variou s kinds i n order to catch thei r prey or to wage wa r a gainst their foes The parallel draw n by D arwi n and Ziegler betw een the w ars o f apes and o f savages proves to an un p rej u diced observer the very reverse o f what D arw in and Ziegler intend e d to prove i t proves th e essen ti al di f . . f eren c e b etw e en th e m erely o f t h e h i g h est ver teb r a t es f acul ti es of ma n sen si ti ve, th e a nd , psych i c fac ul ti es spi ri tual men tal , . 2 Mi l i tary E xpedi ti o ns of t h e A maz on A n t Th e . an d f th e S ang ui n e S l avemaker The wars o f ants bear far greater resemblance to human wars than those o f th e apes Indeed ants no more than other animal s u se any other weapons than those furni shed by nature namely thei r s wordlike mandibl es thei r poison stings and poi son syringes but they u s e th e m in a manner which o f all ani mal combat s most r e sembles human strategy Whoever watch e d a mil itary e xpedition o f th e re d A ma zon ants l ‘ ( P ol yerg us ruf escen s) o r o f the sangu ine sl avem ak ers will no longer ent e rt a i n any doubts o n the subj ect Th e A mazon ants th e European P o lyerg us r uf escen s 2 as well as th e Nort h A merican P l uci dus a dvance o . . , , , , . . , . , issu f th b k D i z s mm g s t z t N st r ) S i c th d g m isc h t K l i d A m is I h v h d cc si i L i z r Vi b s rv mb r f t h r P l y rg xp d i t i s t d b si d s s v r l xp d i t i s r Vi L im d i g i b r g ( H ll d ) t sh i i g l m k wh s h bi t s h ) C ll d b y Mc c k t h b s rv d r t h A ll gh y m t i s T h r s t ill t h r th r s b sp ci s ( r c s ) f P f f N A m ric P b i p d i E m bi c l r W m F d m ic 1 un n e e a n e an o 2 e u a . , e , e e o o o o a e c e o . an e en e . en nu e u a e , en a e e e a en o us e enn a n ea on e o e o o e e an e a e n on on e , n . e as a u n ea oo a e e er e sa n e n ea e e , e o o on e n en n a e u e en n ea an o e “ oo ru ex “ s ave n n o un a n e sce n s a n us ou n or . a e e . n . e r, o e a a re e ee a, . e o rev c e e s Wars a nd S l ave ry K i ng d o m i n th e A n i m a l 45 . the w ar —path i n large ser ried colu m ns the sanguine sl ave m ak e rs however t he Europ ean as well a s the 3 North A m erican i n smaller less serried detachments b oth but especially the A mazons t ry to st o rm the hostile nest by a fierce attack and to stun the numeri cally superior foe and to p ut him to fl ight by the suddenness o f the onslaught G reat success gen e ral ly “ attends these tactics Forel in hi s F o urmi s d e l a ” p 30 6 has s e v e r a l s imil a r instances S ui sse some o f which w e wi sh to bring to the notice o f the reader When For e l brought a b a g containing a whol e colony o f m e a dow ants ( F pra ten si s) which i n siz e and strength surpas s th e A mazons i nt o th e neighborhoo d o f an A maz o n nest several o f the Am azons at first dashed fiercely into the m idst o f their numberless enem i es ; twenty o f them were as a rule suffi cient to rout fi fty ti m es that number o f pra ten si s A nother time an army o f Am azons j ust returning from th e pillage o f a slave ne st were de p o siting thei r spoil s of ant pupae i n their nest previou s to setting out o n a new expedition when Forel at a distance of one m eter from thei r nest an d i n the path o f thei r expedition emptie d a large bag o f F pra ten si s In thr e e minutes th e whol e army o f the A mazon s had encircl ed the h o stile camp app e aring quite un ex They stormed it in an instant dr o ve out p ect e d l y the pra tensi s and ransacked the nest for i ts cocoon s — I woul d like to hear of apes ever di splaying similar mi litary skill It i s characteri sti c of th e military tactics o f those on , , , , , , , , . . , . , , . . , , , . , , . . . , . F rmi c r bi c d d i t g r r c s f t h E r p F r mi c 1 c an ) a e u a o o e un u o a an e an o n e a Em . are a san g u i n e a . th e pri cip l N n a . A me ri Chap ter II 46 . ant spe ci es which undertake slave huntin g e xpeditions to kill the hostil e ants only when resis tance i s o ffered Fl eein g F fusca o r r ufi bar bi s are pursued mer e ly to obtain the larvae an d pupae which they are carrying booty not slaughter i s the obj ect of the victors o ff ; I f apes o r other higher animal s were to act s imilarly in thei r war s then our modern advocates o f e volution woul d not fail to make the followin g reflections : “ H e re w e fin d th e first t races of g en ui n e h uma n i ty which sh rinks from unneces sary bloodshed ; what these animal s c o ns ci o usly ai m a t i s n o t to fi g h t but ” In ants such to g a th er th e frui ts of vi cto ry etc reflections are readily granted to be ridiculou s human i z ati o n s o f the brute ; but never would i t be conceded i n th e case o f apes not because the psychi c mani festa ti o ns are really di ff erent but rather to sa feguard the evolutioni stic theories The mil itary skill o f the A m a zons ( P o lyerg us) i s no doubt unexcelled amongst ant s but also amongst other animal s It i s even far superior to the military tactics o f th e sangu ine sl avemaki n g ants although the latter mani fest in thei r w hole character a mor e p e rfect “ ” devel opm e nt o f what i s called individual i nt e ll igence i e the suitable application o f their sensitive exp eri e mees But th e A mazons i n p ri vate li fe are the dull e st ” “ and most aw kw ard i nsti n ct b ei n gs you can imagine A lthough they are a b l e to take liqui d food by l ickin g j ust as oth er ants they have neverthel es s almost totally lost th e instinct o f feeding them selves an d woul d starve unless they be fed from the mouth o f their slaves Thi s fact makes it quit e evident that even in the g randest mil it ar y exploits o f the A ma zons there , . . . , , , , , . , , , . , . , , . . , . . , , , . , Wars a nd S lavery K i ng d o m i n th e A ni mal 47 . enters not the slightest trac e o f genuine intelligence but only instinctive sensitiv e faculti es ; f o r an anim a l that even i n a state o f ut most des titution i s unabl e to combi ne hi s fe e ling o f hunger with the perception of nouri shm ent and the impulse t o eat can surely not be credit e d with even the lowest d e gree o f d el i b era , , , , “ A b ei n g th a t i s ph ysi ca lly a bl e to ea t, b u t ha s l ost th e h ab i t of i t i s th e g rea test l i b el o n ani mal i n tel ti o n . , l i g en ce . thi s conclusi on D r S mal i an has rai se d an obj ection which we are now going to examine He bel iev e s o ur argumentation unsoun d ; an d ask s How does Wasmann kno w th a t the P o lyerg us are at all able to feed ? T h e b a sis o f hi s argument is i n conclu ding fro m th e n a ture o f the eating organs the abil ity to eat A n d h e states that he has once seen P o ly erg us takin g food indepen dently ; however the m atter i s doubt ful ; for i n the case o f animal s whi ch otherwise never fe e d themselves but are alw ays fed by others it i s i m possibl e to know whether the food they ” touched was actually consumed T h a t S mal i an shoul d make such an obj ection may be explained only by assumin g that he does not know th e mode o f l i fe of P o l ye rg us from actual observa tion ; otherwi se he woul d hardly have been led to attack B esi des he has not reproduced o u r argu mentation i n full th e proo fs which h e controverts Indeed it was al so from th e anatomical structure o f the mouth parts o f thi s ant that w e drew the conclusion that no organi c impos sibil ity pr e v e nt e d the i ndepe n dent f e ed A gainst 2 . . , , , , . . , . , , 1 A me ) is 2 ) “ en , “ z s u am m e n Die p . l s A te 20 4 g s t zt e e en N st r un d Lb de r e e . un d N e ue s au s d em e en g mi sch t K l i p 42 A m is en e e en , o o n en . . der C h ap ter 48 ing o f P o ly erg us O ur chief argument however was the bi ol og i cal fact that the A mazons do really some ti mes lap up liqui d food i f by c h a n c e it comes in con tact W ith the lower parts o f their mouth D r S mal ian ha s undervalued th is fact N ot only once but repeatedly I saw and followed it up w ith a lens h ow some A mazon which had pierced an ant pupa with it s m a n dibles l i cked up w ith her tongue the flui d flow ing from th e woun d and sometimes spent a consi derabl e time in thi s occupat ion N ow since the recept i o n o f foo d i n ants gen e rally takes place by licking it i s hard to understand why i t shoul d be imp o ssible to know “ in thi s cas e whether th e food has actually been con ” sumed B eside s D r S m al i an has failed to notice A dl e rz obse rv ation s m entioned in the very pas sage quoted by him Like mysel f A dl erz has witnessed that the A mazons frequently l ick up the moisture condensed on the glass wall s o f their arti ficial nest s That A mazons a r e a b l e to feed ind e pendently i s there fore an est ab l i sh ed fact which can not b e done a way w ith \Vh y there f ore do they starve when they are confined i n a test tube together with some honey o r some ap p eti z ing ant pupae bu t separated from their slaves by which they are wont to be fed ? The only possible and p sy ch o l o gi cal l y correct answer i s becau se their hunge r does n o t com pe l them like oth e r animal s t o seek f o r fo o d th emsel v es but only to b eg foo d o f other ants by taps o f thei r feelers Th e sensitive p e rception o f the food plac e d immediately before them in spite o f their feeling of hunger does no longe r excite in them the natu ral i mfiul se o f tastin g it Wi th th ese a n ts . , , , , . . . , , , , . , , , , . ’ . , . . , , ' . , , , , , , . , ’ . , Wars and Sl avery i n th e A n i mal K i ng d o m 49 . u e o o i n e e n d n s t d f e t p q f od and f i n d ep en d en t r ec ep ti o n h as p erf e c tly d eg en era ted th e i nsti n c t o f o i ts Th e y have b e com e utterly dependent on th e ir slaves O nc e mo re we ask D r S m al i an and other friends o f animal intelligence : I s i t possibl e that a b eing w hich pos sesses but a trace of intelligence shoul d no longe r b e abl e to combine the sensitiv e perception o f its proper foo d with the f e el ing o f hung e r ? Therefore we still maintain : A b ei ng t h a t i s ph ysi cal ly a bl e to ea t b u t . . . , , , h as “ u n l ear n ed o n a n i m al ” th e h ab i t o f it , i s th e g r ea test l i b el i n tel l i g en ce . The b rill iant m ilitary talent o f the A maz ons is th e r e fore a mer el y i nsti n cti ve pow e r which i s assisted by no i n divi dual int e lligence Just the most wonderful mani festati o ns o f the p sychic l i fe o f animal s such as to a sup erficial observer exhibit th e most striking r e semblance to intell igence upon closer inspection tur n o ut to be evi dent proofs o f the w ant o f indivi du a l intelli gence i n animals The brighter th e light the darker the shadows The san gui n e sl avema kers a ff ord u s far better groun d than the A maz o ns for assuming that i n thei r m il itary expeditions ind ivi dual int e llig e n ce comes i n for a consi d e rable share S ome scouts o f F sang ui n ea happenin g up o n a nest o f some slave species return w ith the news A s soon as the favor abl e moment for an expedition has arrived they go ahead show ing the Way Up o n arriving at the hostile nest they gener ally do not rush bl indly to the attack but institute a formal blockade ; then whil st o n e detachment i m p et others keep a uo usl y forc e s its way to the interior careful watch o n the outsi de an d rel ieve th e flying ’ , , , . , , , . . , . . . , ~ . , , , 4 Chap ter II 50 . inhabitants o f their larvae and pupae wh ich are the only obj ects the robbers have i n view O n the part o f the sang ui n eas thi s show s great cunning and looks very much like intelligence I f a tr 0 0 p o f ap es at war with others w ere to surround th e forest home o f thei r f o e and i f a sel ect sq uadron o f th e assai la nts w ere to penetrate int o the woods whilst the other part lying i n ambu sh trie d to capture the fugitives h o w o ur modern evolutionist s woul d be delighted w ith these apes ! S uch an argument for animal intell igence the y wou ld deem absolutely irrefutable an d they woul d “ no doubt allow thi s to be an intelligent stratagem But sad to say n o t apes but merely ants are skilled i n “ such stratagems ; yes ants whose b rain can by no means compare w ith the brain o f the highe r animal s I I f the development o f the brain i s the real cau se o f i ntelligence then o f course apes ought to be at l east as i ntelli g ent as ants o r rather far more i ntell igent In real ity the reverse i s the case and thu s things loo k rather qu ee r f o r modern evolut ioni sm L e t us return to the mil itary tactics o f th e san gu ine sl avem ak i n g ants O ne characteri sti c feature that o f reconnoitering the n est they wi sh to plunder th ey have in c o mmon with the A mazon s With th e se latter ants according to Forel s observations and my o w n singl e individual s are wont to set o ut to i nv e stigate the site o f a slave n est and thu s frequentl y enable the whol e army o f A mazons to advance in serri ed columns over a di stance o f thirty yards o r more almost i n a straight li ne to the pl ace they had marked out This surpri sing fact repeatedly observed by Forel and by mysel f can n o t b e e xpl ained i n any other than th e above men , . . . , , - , . , , " , , , . , , , . . , , . , ’ , , , . - C h ap ter II 52 . indivi du a l s th e y woul d surely show the prudence and precaution o f previously exploring more accur at e ly t h e forc e s o f the foe they want to attack Thu s they woul d not dare an assault upon stronger s lave nests until a greater number o f forc e s w e re collected ; then they would like th e A mazons fall upon the hostile nest i n compact mass e s o f ma n y hundreds or thousands at a time and woul d take the hostil e position by storm w ithout an y consi derabl e loss Why d o es such a ch a nge nev e r occu r i n the tactics of the sanguine slave makers ? A colony o f these robbers wh ich for many succ e ssive ye a rs ha s pillaged the slave nests of the n eighbo rh o o d and h a s experi e nc e d t he di f f e r e nt resi st a nce o ff er e d by di f ferent hostile colonies coul d easily rem e mb e r their respective strength an d coul d regul a te the manner of future attacks according to thi s know l edge It w oul d be all the ea sier f o r them to m ake an intelligent use o f their former achi e vements and rev e rs e s b e cause th e worker ants g e nerally liv e for th e space o f at l ea st two or e v e n three ye ars A n d yet not a trace o f all thi s c an actually be found F sa ng ui n ea will forever cli n g to h e r wont e d tactics o f setting out i n small scattered b a nds even i f bloody failure shoul d eve r so o ften be the result T o an unprej udic e d p sychologi st such facts be a r suffi cient evi d e nce o f the fact that the warfare o f F sa ng ui n ea a s w e ll a s o f P o l y erg us i s gu ided m er e ly by h er ed i tary i n sti n c ts n o t by i n d i vi d ual i n tel l i g en c e Those tactic s w e re n o t invent e d by th e i n tel li g en ce o f th e an ts ; oth e rwi s e t h e same intell igenc e o f th e ants woul d be abl e to perfect and to d evel op them Y e a mor e : t h e assumption o f ant intelli gence i s contradictory to the , . , , , , , . , , . , . . , , . . . , . . Wars and S l avery i n th e A n i m al K i ng d o m . 53 fact that those tactics are speci fi cal ly co nstan t and are sp e ci fi ca l l y th e sa m e throughout the enti re territory inhabited by F san g ui n ea D r S mallan has trie d to invali date thi s conclu sion “ 1 al so H ere is hi s obj ection I t was totally wrong o f 2 Wasmann to demand that th e san g ui n eas shoul d change thei r tactics inst e ad o f continually attacking i n sma ll tr 0 0 ps and thu s being e a sily over p owered by large troops o f fusca or rufi bar bi s Thi s mode o f war fare i s inborn an d there fore i nstinctive no less than ” the pillaging habit itsel f D r S mal i a n i s w rong in beli eving that w e had i n real i ty d e m and e d o f F sa ng ui n ea t o change her hereditary instinctive stratage ms O u r d e mand wa s mer e ly the well known m ethod o f argumentation ex a bsur d o which th e criti c s e em s to have mi sunderstood In th e supposition assumed by S m al i an but rej ecte d by u s th a t ant s b esi d es their inst inct pos sess al so a certain degree of genuine intell igence i t i s perfectly j ustifi abl e to dem an d that thi s intelligence shoul d also be ma ni fest ed and d i spl ayed I f thei r tactics are inborn only as to their outlin e s thi s m ani festation ought necessarily to consi st in ch an g i ng th em i n t el l i g en tly according to circumstances an d consequently i n thei r g rad u al perf ec ti o n But there i s no trace of any such advancement towards per fection and there fore we are right in concluding : Th e se red marauding ants have Thi s m ode o f argu o n l y i n sti n c t n o t i n tel l i g en c e “ ” mentation cannot seriously be styl e d totally wrong Wherever the sanguine sl avem akers l ive they w ill , . . . . . , , . , , . . . . , . , , , , . , , . , . , . , 1 ) 2 ) L “ . e . Die , p 41 z s m m g s tzt . u a . en e e en N st r e e , e tc . , p . 2 03 . C hap ter I! 54 . follo w th e hab it o f invading nests o f certai n smaller speci es o f F o rmi ca and of rearing the robbed worker pupae pa rtly at l e ast as au xi li ary ants for their own colony It i s moreover a constant characteri stic of F sa ng ui n ea to have rather a small numbe r o f sl aves i f compared with those o f the Am azons With these latter the slaves are far more numerous than the masters with the form er it i s the revers e Likewi se the spe cific m ilit a ry tactics are ev e rywhere equall y constant w ith both ant species From the A lps to Englan d an d S candinavi a from Hollan d to the C au ca su s F san g u i n ea nowhere changes her habits and cu stom s Even her North A merican sub sp e cies n ct o f slave r u b i cun d a E m shows the same insti ( ) making and this in the same sp e cific form The only di ff e rence i s that o n e o f the two European slave species F f usca i s represented in th e North A meri can r ubi cun d a col o nies by a cl osely allied variety nam e l y 1 by F subscri cea S ince the separation o f North A merica from Europe was completed in the Tertiary age th e ensl aving habits o f the sa ng ui n eas and their m i lita ry tactics must have been essentially the same i n the Tertia ry as they are tod a y Thi s i s the m ost natural explanation for the specific uni formity o f that i nstinct in the di ff erent part s o f the globe O ne thing h o w ever i s certai n : i f th e impul s e o f sl avem aki n g and the specific mil itary tactics o f F san g ui n ea were due to the intelligence o f th e ant s or i f they were even i n the slightest degree dependent on it such a specific uni formi ty exi sting for th ousands o f y ears woul d b e , , , . , , , . . . , . , . , . , - . . . , , , . , , . . , . . , , . , , u t ter l y 1 t e ) S i n co n cei va b l e ee rmi t p h il o W as en m an n “ , r rp A th o . K ri t isch s o d en e ” V e rz e i ch n i ss d er myrmekop hi l en un d 1 63 E p . . Wars and S l avery 3 Th e . “ P r et e n d e d A ut o mati sm L i f e of A nimal K i ng d o m i n th e A n i m a l i n th e 0 55 P sy ch i c A n ts . intelligence there fore has no p art either i n the sl avemaki n g expeditions of ants o r in their military tacti cs Yet the appl ication of thes e insti ncts is not m athematically uni form Th ey are influenced and governed by the changeabl e sensitive perceptions and individual condition s of the s ingle ants an d thus great variabil ity exi sts w ithi n specified limits Thos e ani mal psychologists w h o i n contradistinction to th e “ ” higher animal s call ants mere i nsti n ct a uto ma to ns “ or even mere refle x machines are asked to consi der t hat th e instincts o f ants are neither more nor l es s ” “ than thos e o f dogs apes and oth er verte a ut o ma ti c b rates Instances o f intelligence i n the true sens e o f the term can be discover e d with th e latter as littl e as an d even much less than with ants V a riou s di ff er o f indivi dual character and o f indi e n c es however vidual action determined by di ff erent sense perceptions an d sens e experiences occu r w ith ants as well as with th e highe r mammal s O n turning over the stone o r the piece o f s od covering a m i ddlesized nest o f F sangui n ea and thus su dd e nly exposing the interior to th e light w e perceive all the inhabitants in tumultuous excitem ent P art o f th e ants furiously biting and ej ectin g po i son attac k the invader others tak e care of thei r imperill ed o ff sprin g an d i n haste carry d o wn the eggs larvae an d pupae t o the lower chambers of th e nest ; other indi of th e vi dual s o f the same colony s eem destitute chival rou s spiri t of thei r race f or the defens e of , , , . , . , . , ‘ , , , , ‘ . , . , , , , , , . . , , . ' , C h ap ter 56 11 . count ry and escape under shelterin g grass tu fts or clods o f earth ; sometim e s even i n the mi dst of her fightin g rescuing o r fleein g comrades a sa ng ui n ea p res ses hersel f to the soil motionl e ss and though mostly f o r a sh o rt time has recourse to the instinctiv e “ trick o f feigning death i n opposition to th e se other sa ng ui n eas finally seem to be seized by a str ang e mixture o f cou rage and fear by a sort o f impotent rage : n ot v e nturing to a ttack the real f o e th e y v e nt th e i r spite aga inst other obj ects ; w ith sprawl ing f ee t th e y crawl along th e ground an d with th e i r h e ads bent down they furiously bite the sand or stalks o f h e ath e r attacking ev e rythin g i n fact but the finger of th e great human monster that robs th e i r n e s t o f L o me 1 ch usas a n d oth er f a vorit e gu e sts S uch sc e n e s as th e o n e j ust describ e d I have obs e rved hundr e ds o f tim e s a n d am so accu stomed to them that I find them quit e natural ; neverthel ess they are of the utmost i mport ance for comp a ring t h e ps y chi c faculties o f ants and th o se o f th e high e r animal s P a cks o f wolves or horde s o f a pes on s imilar occasions coul d display n o grea ter vari ability o f indivi du a l char a cter and o f i ndivi du a l action th a n such a colony o f sa ng ui n eas Y e t a n ts “ ” w e are tol d a re i nstinct automat o ns an d apes o r wo l ves a re not ! , , , , , , , , , , , , , , , . , , , . . , , , , , c l i s f t h N r th A m ric s b sp ci s f g i t m F bi c d t h E r p L m h is r pr s t d b y R f P r iri lli d sp ci s X d c H M k m S d C h i ( W isc si ) h r c tly f d ls th c ri s ps d gy t f rm wh ic h is d t t h d c t i f t h l rv f L m h i i by th ts i th c l i s f F r bi d S W s m N 1 ) In un ru . a th e a, e e e u o on e en o , en an o n , B e sta e t i gu n g e n sch fig r e ut the . u e a va u sa as ue an 2 00 o 1 . e der o ev . e o on e . uc anu a . en e o u a e o s ru u sa ec on u . u an e o e an n on , e D u o e e o o sa o e cun a e u a ae ‘ ee . L o m c c h usa P se u d o gy n e n t h e o ri e - Ge se l l sc h f X e n o d u sa . l 1 90 2 , at e r o n, p 98 1 0 8 - . o an d pp si t p o e . Pl 1 81 . . ” e an en e o . ou a eu o o a u ne a , sa n o e an n , er o e e an n ec “ , ( V e r h an d l We o . e ne us n e ue de r sh ll giv a e Wars and Sl avery i n th e A n i mal K i ng d o m 57 . do g bitin g the stone thr o wn at him i n hi s bl ind “ rage acts j ust as aut omatically as a sang ui n ea which vents her fury on the e d ges o f a glass tu b e so that you can hear the gr ating noi se m a de by her j aws A n d i f certai n i ndividu a ls o f an ant colony acquire through thei r sense experience special disposi t io ns and char act e ri st i c s w hich di stingui sh them from other indivi d “ n a l s o f the same colony th e n th e y act a u to mati cal l y as littl e as dogs or apes or oth e r higher mamm al s do S ome remarkable instances of this may find a place h e re In the observation nest o f F san gui n ea described o n p a ge 2 3 some beetles c a lled D i n ard o d e n ta ta which I introduced had at first been r e c e ived a s u sual w ithout di ffi culty a s indi ff e rently tol e rat e d guests and h a d ev e n p ropagat e d in the nest But s eve ral t im e s I put i n a l ittle large r D i nard a speci es ( D M ae rkel i i ) whose u su al host i s F r ufa and wh en fi n ally som e smal l sa ng ui n eas and their slav e s had succee ded i n s e izing and kill ing this b ee tl e which as a rule i s unassai labl e owing to its w e dge shap e d body o f f e ring scarc e ly any 1 po int o f attack then a numb e r o f ants o f thi s colony gradually took a liking to catching D i n a rd as which liking prov e d dis a strous also to the sm a ller D i n ard o N ot all the i ndivi du al s o f th e di ff e r e nt ant d e n ta ta sp e ci e s o f that colony h a ve acquired thi s strange p a ssion A mong twelve workers o f F sa ngu i n ea which I put from this observation nest int o a small e r exp e r i menting nest tog e th e r with seven D i n ard a A , ” , . - , " , . , . . , , , , . . . , , , , , - , , . . 1 Ztg . , s r ) S e e W a m an n 1 896 , 4t h to p h i l e n , de . p 435 L yd . e en , an d r D i n a d o A t en 0 th ( E xt r . - d iss d C m pt r ue , u o an e “ o de D ie en du r R ss E tm M y m k p h il d T rm i C gr es i t r d t r isi em - u a en , r e o ” in W ien en o e on un . n o . e n e n. Chap ter II 58 . Maerkel u there was b ut on e D i narda hunter Whilst the rest remained perfectly passive towards the D i nard o thi s one ant immediately began an active hunt Had I n o t soon removed her from the small nest she w oul d probably have aroused in her com panions t h e i n sti n ct o f imitation for a similar p ersecu tion a fact which I have often observed But by removing thi s passionate hunter I preserved friendly relations between th e other ants in th e same e xp eri m e n t i n g nest ( 1 1 sang ui n eas 2 rufi bar bi s 2 fusca ) and th e D i n arda M aerk eli i In the greater observation nest from which I had ta k en these indivi dual s the D i n ard o hunt which had b egun w ith the k illing o f D i nard o M a erkel i i i n M arch 1 896 continued against D d en ta ta until N ovemb er o f the same year when the ants gradually returned but only for a short time to thei r former toleration o f thes e gu ests The resuming o f e xperiments i n the fol lowing spring resul ted finally i n th e complete exterm ination o f a ll the D i nard as i n that ob servation nest D uring the following si x year s I never succeeded i n securing the exi st e nce o f ev e n a singl e D d en tata i n that nest although i n nature thi s b eetl e i s indi ff erently tol erated i n all sang ui n ea nests ! The psycholo g ical i mportance o f these phenomena has been pointed o ut already i n o ur discussion o n the ! diff erent form s o f l earning in the animal kingdom A nother strange fact quite i rreconcil abl e with th e ” bl in d automati sm o f i nsti nct i s the b ehavior o f ants regarding the n um b er o f D i nardas and other beetles . , , . , . , , , , . , , , , . , , , . . , . , I sti c t d I t lli g c p 1 57 A ls D i psych isch pp 84 88 93 1 . “ ) n n o . . , an “ n e en e , e n e, . e tc . ( H rd r e Fa eh i gk e i t en is S t L ou Mo , ” de r A me en ( t ut t e , . is , . S g rt a , 60 II Cha p ter the L omech usas . but merel y toward thei r ex cessi ve n umb er which became disagreeable to them P erhaps they were u n able t o f e ed so many b e etle s and had the re fore e xpell e d h al f o f them A t any rat e such phenomena prove to a certainty that ants are n o t to be regard e d as mere i n stinct automaton s or ” “ refl ex machines We mu st ascribe to th e m sensile m ental faculties which by way o f di ff erent percep tions an d representations cause gr eat variability in the display o f thei r insti n cti ve impul s e s But b eyo n d th i s n o th i ng i s required to expl ain s a tis factorily the p sychic li fe o f the vertebrates H ence th ere i s no need o f “ animal intelligence neither in the ca se of ant s nor in that o f the h igh e r animal s A b e auti ful instance o f how s e nsil e experiences o f ants le a d them to acqu ire certain in divi dual p e culiar iti e s o f character I w itnessed in the case o f a F r ufi b arb i s o f the same m ixed colony S h e was a worker easily d ist ingu i shabl e from the others by her sm all si ze S h e u sed t o vi sit regularly th e gl ass bulb o f the feed ing tube ( see diagram p where she w o uld lick the h oney o r sugar in order to supply the other ants in the mai n nest from the sweet j uice stored up i n h er cr 0 p A lthou gh F r ufi bar b i s belongs to a very irritable an d pugnaciou s species yet thi s ant had gradual ly become so ta me that she woul d allow h er sel f to be fed from my hand A s soo n a s I removed the cor k o f the glas s bulb she woul d come o ut and l ook for food o n th e outside I woul d then present t o her a ne edle dipped in honey A t first she da rted bac k bu t a fter a few seconds o f h e sitation she woul d approach examine the needl e w ith her feelers and as such, . , . , . , . , , , , . . , , . . , . . . , . , . . , , Wars and Sl avery Ki ng d o m i n th e A ni ma l 61 . lic k o ff the honey Later o n I pl aced the honey o n my finger The ant had already becom e so tame that she was n o t in the least di sturb e d by the odor o f my finger whereas others woul d hav e been provoked to a fight o r would have been greatl y alarm e d She woul d quietly lick o ff the honey an d then withou t resi sting or trying to flee allow hersel f to be s e ized with a pincette by o ne o f her l egs and placed back i n her nest T his goes to prove that an ts al so are t a ma b l e in Sp ite o f thei r excit able nature The tamable nes s o f ants like that o f higher an i m al s i s due to thei r possessing the pow e rs o f sensitive perc e ption an d i m ag i n at i o n upon which the intell i g ence o f man act s to accompl i sh his purpose A gainst thi s p aralleli sm an obj ection was rai sed 1 by M r Bethe To tame an ant he says takes weeks and month s ; but a dog m ay be tamed in a few days ; there fore the a bove men tioned fact p resents no proo f o f the exi stence o f psychic faculties i n ants ! Whether M r Bethe will succeed each time in taming a vicious dog within a few days i s rather doubt ful N o r i s i t at all t ru e that it takes several weeks o r month s to tam e an ant e g a F f usca o r r ufi barb i s which are especially suitable for such e xperi ments It i s bu t requi red to mark a certai n indivi dual which comes re g ularly to the fe e ding tube I f you ar e very care ful not to frighten the animal it i s p ossible to train it i n a f e w days in the manner described above Bu t i f you wi sh to reckon th e time needed for taming an ant by beginning wi th the day on which she was . . , . , , . . , , . , . . . , , . , . , . , . . , , . . , . , 1 “ ) D ue r f e n z usc h r i b e ” ? en ( B wir on n , de n A me p . is en 23 . un d Bi e n en psyc h isch e Q ual i t aeten Chapter 62 11 . first deprived of her freedom and placed in the arti fi ci al nest th en th e same method o f calculation must be appli ed in the case of the do g M r B ethe should not th ere fore take for hi s experiments a domesticated do g b u t h e would have to operate upon a newly captured animal o f the w i l d dog species Then let u s see which woul d take longer to tame a wil d dog o r to ta me a wil d ant ! There are several othe r interesting analogi e s b etween th e psychi c li fe o f ants and that o f dogs A small dog as long a s he i s in the company o f hi s master o r of some stronge r comrade w il l not be a fraid to meet a rival wh om oth e rwi se he woul d try to avoi d Th e same i s the case w ith the small blac k negro ants ( F f usca ) wh e n they are i n company with sang ui n eas In thei r o w n coloni e s they are generally cowards A s soon a s their n e st i s distu rbed they flee and try t o h ide thei r young bu t when they are sl aves i n colonies o f F sa ng u i n ea they are the bravest de fenders o f th e m ixe d colony as I have o ften experi enced to my cost Ju st as i n the mix ed colony o f F sang ui n ea the instincti ve courage o f F fusca which i s otherwi se so cowardly i s to be expl ained psychologically fro m their perception o f th e great num b e r o f valiant companions and thei r consequent sense of sol i darity w ithout sup po sin g any reasonabl e deliberation o n thei r part so al so are the di ff erent degrees o f cou rage found in different colonies o f the sangu ine sl av emak ers to be accounted for I f a numerou s popul ation inhabits a rotten fir st ump o n the sur f a ce o f wh ich we find som e o f the ants running about a gentle kick will at once call forth a whole army ready f o r the fra y In a , . . , , , . , , . , , . , . . . , , . , . , . . , , , , . , , . Wars and Sl avery K i ng d o m i n th e A n i m a l 63 . moment the whole sur face o f the stump i s covered with thousands o f ants furiou sly hurrying to and f ro But i f the colony i s weak the same ki ck whi ch at other times call s forth an army will have th e co n The ants which j ust before were running t rary effect abou t the sur face di sappear through the e ntrances o f the nest a s i f by magic an d deathlike quiet succeeds I f in ants thi s appropriate estimation o f the strength o f thei r o w n colony i s characterized as i nstinctive an d thi s i s no doubt the only correct expression then similar occurrences among higher animal s shoul d 1 also be credited to i nstinct and not to intelligence Y e t the courage o f individual ants in a colony i s dep e ndent n o t o nly o n the perception o f the great number an d cou rage o f thei r comrades In populou s col onies al so o f warlike species such as F sang ui n ea th ere wil l always appear considerable di ff erence s in indivi dual cou rage as we have shown above S ome times even single i solated individual s ma k e head against a numerous foe S uch an example o f hero ” i sm scarcely ever equaled by dogs lions an d tige rs 2 w as once witnessed by Ro th n ey in Bengal A mi d dle si z e d w orker o f a large bla c k ant spe cies ( Cam . , , , ~ , . , . , , , , , , . , . . , . , , . , , , . - F r l ( U p r c d P syc h l gi c m p r é p 25 ) m s i st c wh r v ry s t r g c l y f C mp t Ii g i ti wh fi gh ti g wi th F p r t i sh w d m r w rlik spiri t p rd th is t h c st m wi t h th r d i ry c l i s f th t sp ci s W f lly g wi t h F r l i f h i f rs t h r f r m t h xis t c f pl st ici t y i th ts psych ic f c l ti s i b s rv t i s m t i d O w b v pr v th v y s m Y t i c si d ri g th is pl s tici t y f th s si t iv p w rs f c g i ti pp t i t t b ss t i lly i d t ic l d wi th h m i t lli g c h i s t ir ly wr g w h v sh w i f r m r p b lic t i I s t i c t d I t lli g c i th A i m l K i gd m I d i A t s p 349 ( Tr n s c t E t m S L ) N t s 1 ) on e o n e n an us, an a en o e u o 2 do n , an u e “ e e o e on, on “ n an e n on e, n an e . an en e n , an n e a o e , o e on a e e n e . on en e e a as , n e a e e on en a . a e n o one e o a n ” a en e u e . a e n e o n o a e en e o e e a e n o n o n o us a o en . o o ur . e o on o on e e e n a o en e e er o on na a o e a e n s s, o n e n e a o e e a e a u e o o . o e o e e o e a r ee e n u e n e, en an u a e a en o a n . o c. a n n o ” . on Chapter II 64 . c o m ressus ) attacke d quite alone a whol e colony o f small red ants ( S o l en opsi s g emi n a ta ) Without m oving from her place she remained b e fore the entrance o f th e S o l en opsi s nest fr o m p m until night seiz e d the ants with h e r j aws as th e y came o ut and bit them i n two A t l a st sh e was ove rpowered by superior numbers and a fter h a ving kille d 1 50 o r 2 0 0 o f h e r foes she paid for h e r temerity with her l i fe We leave it to the mod e rn worshippers o f anim a l int e lligence to rai se a monument to the memory o f thi s insect Leoni das We need not however go a s far as B e ngal to find “ ” such examples o f h eroi sm o f singl e ants Th ere are plenty o f them i n the he ath s o f G e rmany an d H olland an d al so in North A merica D uring h o t weath e r stroll ing work e rs of sa ng ui n ea will frequently enter into a fierce battle with colonies o f L asi us n i g ar o r T e tram o ri um c a espi tu m l iving i n the nei ghb o rhoo d till at l ength when too m a n y o f thei r opponents h av e clung t o th eir legs they fall victim s o f th e i r own fool h ardiness A s cene more harmless indeed yet p sy l e s s remarkable I observed near ch o l o g i c al l y not A larg e E x at en on the afternoo n o f A ugust 1 5 1 894 worker o f F sang ui n ea amu sed h e rsel f for a qua rt e r a colony o f the o f an hou r by blockading all alone small red stinging ants ( M yrmi ca scabri n o di s) S h e lurke d about t h e entrance seized by the n e ck o n e red ant after anoth er as they came o ut carried them quickl y t o a di stance o f several inches and dropped them in order to be back again at once at the entrance to seize th e n e xt cu stomer The M yrmi cas scarcely att e mpted any resistance although several do z ens o f them w ere p o n o tus p . . . , , . , . . , , . . , , , , . , , , , . . , . , , , , , . , Wars and Sl avery i n th e A n i mal Ki ng do m 65 . i n and around the entrance O nly one o r two tried to get hol d o f the intruder by o n e o f her legs but with out success O f cou rse thei r ho rny ( chitine ) armor protected them suff iciently against the j aws o f the sang ui n ea ; all the more as th e latter di d n o t allow h ersel f time to pay special attention to her single foes It was e xc e edingly amusing to see the inde fatigable zeal an d hurry o f the large ant getting hol d o f the small ants o n e a fter another and carrying them away a fter which they sl owly crawled home again It i s har d indeed to say what induced the sang ui n ea to engage i n thi s o d d kind o f ski rm ish P erhap s it was me re love o f fighting That she released the single M yr mi cas so soon might be e xplained by her fear o f th e sting with which these ants are provi ded Yet i t i s more probabl e that the m arau der took a fancy to the entrance of the M yrmi ca nest and o n thi s account tried to e xprop ri ate th e inh abitants Of cou rse her labor was n o more succes s ful than that o f S isyphu s becaus e sh e di d n o t car ry the ants further than a few inches from the nest and b esides th e nu mb e r o f ants coming o ut o f the nest had no end but thi s di d n o t see m to a ff ect her in th e leas t It woul d be ri diculou s arbitrarily to humanize such instances and to suppose all pos sible k in ds o f ” “ intelligent purp oses o n the part o f the ant as i s cu stomary with popul ar psycholo g y Yet on the other h and it cannot be denied that mechanical auto m o f instinct will never e xplain them The only at i sm sati s factory sol ution psych ology can give i s to ascribe to ants sensitive powers o f cogn ition and app e tite which under the influence o f e xteri o r sense per . , . , , . , . . . , . , , , , . , , , , , ‘ . , , . , , , . , , , 5 Ch ap ter II 66 . c ep t i o n s and indivi dual dispositions are the principle from which these various spontan e ou s activiti e s result with no di ff erence as to whether the actions are per formed by ant s o r by dogs an d apes Th e phenomena describ e d above may be class e d “ “ ” ” 1 among th e sports or games o f a n imals as G roos terms them T h e facts record e d deserve these names perhaps j u st a s well as the sports an d games o f th e f high e r animal s ; onl y it i s ge n e rally much more d i fl i cult to ascertain the nature of given facts in the case o f an ts A mong the heaps o f ants that gather o n the surface o f t h e ant hill s o f F r ufa and pratensi s as al so in my artificial nest containing sang ui n eas when exposed in spring to th e warm rays o f the sun I hav e rep e atedly observed instances o f harmless w r e stling beginning with an d acc o mpanied by liv e ly and playful movem ents o f the feel ers Th i s be havior o f th e ants seems to be du e t o a resuscitation o f thei r powers a n d al so to an e xcess o f muscul ar energy a fter the winter s rest Forel ( Fou rmi s de l a S uisse p 36 7 ) has mad e 2 i r a t e n s s similar obse rvations w ith F p and Huber with F r ufa an d pra ten si s I cannot consi de r these gam e s , , , , . , , . , . - , . , , . ’ . . . . , . pp 125 d 1 35 B y th w y d c fi d t i t r st i g th t t h ri t y Gr s h r fr q t ly m isr pr s ch r w h h f B t t d H b r s d F r l s b s rv t i s t s i t h i w p rp s s f h m izi g t h b r t F r l i t h E t d s my mé l gi q h xpr ssly pr t st d g i s t B h m isr pr s t t i s f h i bs rv t i s T h b k f G r s c t i s i g r l g r t m y s t t m t s f d b t f l v l i spi t f t h cri ti c l s t d p i t f r m w h ic h th th r m i t i s t vi w t h f cts R c h rc h p 1 5 1 d s t y w h th r ) Si c H b r i hi d d m s th f r mi f r g t d d ir w t h d ci d w h ic h t i t is h r d ly b l t 1 “ ) oo ue o e o e ’ a u e en e a e e e e as no o u e a e en e u o u e s, s o a e an e a en u on u e ou o u an u e e e oo oo o a n a n o no sa . a n a a ue , , o ’ e n o e . a au e an e o au n e en e o as e e o e e . u n uen n o on on oo co o o n an as s o ea a an . un r e en a e n e o e on a n er s a n Ti r ls wh r w de r o e n e , ’ u ec on ne o , e an e e o S pi l e Die n e e e . 2 n e ean a a e u e n e e ou o e s “ au ve e e e s, e ou os an . . e or , h a oe os no e , e e are C hapter II 68 . invention o f so me colony o f sang ui n eas transmitted b y inheritance to all the desc e ndants of the species For e l Em e ry and S m al i an fully agree w ith o ur tren 1 chant condemnation o f B uech n e r s manner o f human “ ” izin g the slavery o f ant s I t does not seem i mp o s s ibl e h ow ever that for the actuation o f thi s instinct there shoul d be needed special psychi c impulses pro d uce d in th e young ant s by the exampl e and the fe e ler langu age o f thei r o lder companions Yet thi s a ssump t ion i s scarc e ly probable ; fo r th e formation o f new col o nies i s undertaken as a general rul e by single impregnated femal e s ; but th e females o f F sang ui n ea a re devoi d o f th e ensl aving instinct a n d cannot there fore i nduce others to mani f e st i t Y e t si nce it i s the gen e ral opinion that t radi ti o n a nd i nstruc ti o n ai d th e exercise o f the social instincts i n these insects and that the high p e rfection o f their community li fe receives thereb y i ts full explanation we will examine wheth e r in vie w o f the facts thi s Opinion i s still tenable It i s true i n ant communities the i nsti n ct o f i mi ta t i o n plays a great part as we may gath e r from several observation s record e d above By the example and th e taps o f the f ee lers o f thei r ol der comrades the younger ants are o ften induced to actions whi ch otherwi se at l east under the same ci rcumstances they woul d not have per formed In thi s regard as in fact in the other salient features o f the psych ic l i fe o f animal s ants and the higher animal s agree i n all the es sent i al s ; f o r i n the latter al so the so called lessons gi ven to the yo ung by thei r parents consi st only i n e xciting instinct i vel y in the young the faculty o f imitation by the e xam , . , ’ . , , . , , , . , , , . , , , , . , , . , , , . , , , - 1 ) “ D ie z usamm s z en ge e t t en N st r e e , p . 1 82 . Wars and S l avery i n th e A n i m a l Ki ng d om 69 . pl e of their parents I f we interpret tradition and ” instruction i n th i s sen se i t m ust be acknowledge d that they ai d i n the exerci se o f the hereditary instincts bot h in ants and in the higher animal s But on the other hand it i s equ ally obvio us that in thi s case the “ ” ” term s tradition and instruction mean something very di ff erent from what modern animal psychologi sts w ish to insinuate ; for in ou r case they do not imply any i n telli g en t communication o f k nowledge but only the instinctive excitation of the imi tative faculty But i n the commun ities o f social insects no t even th e e ncou raging exampl e o f the older compa nions i s . , , . , , , , , . f or t h e fi rst actu ati o n of t h e y o un g w o r k ers i n sti n cts We have ascertained by experiments that preci sel y th e mo st remark able an d apparently most i ntell igent habits o f th e sangu in e sl avem ak e rs nam e l y thei r r e aring o f slaves and the hospitable care bestowed by them o n the be e tl e L o m ech usa st r umosa are m erel y h er edi tary i nsti n cts for the exerci se o f which no kind ” “ instruction o n the part o f the ol der ants i s of needed To prove thi s w e forme d a special col ony o f “ ” sel f taught young workers o f F sang ui n ea by plac ing i n a glas s fill e d with a suffi cient quantity o f earth a number o f ants that were newly develop e d from their cocoon s i n my artificial nest These sel f— taugh t ant s not o n l v perform ed al l th e works requi red for building thei r nest j u st as the other individual s o f thei r species b ut t h e y al so followed the very same line o f conduct in nursing their young and even in dealing with strange worker pupae which I introduced into thei r n e c essary . , , , , 1 . - . , . , 1 ) c h usa L , p an d 20 2 , ” i n th e strumosa, . c . , . “ B Die i r i l gi sc h s o o i l n t e n at o n a e n e B zi e Ce n tral bl att, ” ’ e h un X II g en vo n L ame 592 . . C hap ter II 70 . nest T h e pupa e o f L asi us ni g er they would either devou r o r th row away whereas those o f F rufi bar bi s were reared by them as auxiliary ants f o r thei r colony A L o mec h usa strum osa which I put in was i mm e di ately received like an o ld acquaintance licked and fed j ust as i s th e cu stom in the other colonies o f F san In the face o f such experi ments the beauti ful g ui n ea theory o f tradition and instruction among ants van i shes into thin air That the ol der ant s lead thei r newly born com rades abo u t th e nest and train them to a k nowl edge e speci ally in the care of l a rvae o f domesti c dutie s 1 i s a fabl e origi nated by Buechner and un fortunately 2 taken u p o n hi s authority even by Ro ma nes and other modern animal p sychologi sts The t ruth i s that th e newly developed ant s are as yet the obj ects o f spe c i a l care and protect ion o n the pa rt o f the others as r em arked al ready by Hube r Being a s yet rather help ” l ess they are stil l as it were considered as ward s Th e sam e applies t o b ee s I n thei r case al so the instru ction sai d to be given b y the ol d workers i s a mere fancy ari sing in the brain o f some an th ro p o mo r A l ready Réaum ur i n hi s classical p h i z i n g observer “ 3 w ork H i sto i re d es In sect es remarks : S carcely have all th e p a rts o f the body o f a young bee becom e su f fi ci en t l y dry scarcel y is she able to move h er wings w hen she i s al ready a cqu ainted with eve rythin g sh e will have to do in th e whol e cou rse o f her li fe He goe s o n t o relate a few observat i ons show ing that . . , . , , , . . . " , , . , , . . , , , . , . , , , 1 ) 2 ) ist sl b d Ti r p 6 2 A i m l I t lli g c ( 6 th p T m V p t II m em X I p 2 7 8 “ Ge “ e n o e a . . en e e, er n e en ar , e . . ” . , . . . 59 . s r A m t e d am , 1 7 41 . Wars an d Sl avery i n th e A n i mal K i ng do m 71 . youn g bees from the very first day are a s wel l able t o u se the i r instincts a s a re thei r seniors O f late some 1 experiments have been ma de by K o gevn ik o v and 2 B ut ke w i t sc h o n sel f t a ught young bee s The result s were practically the same as i n the case o f th e sel f taught ants I t was foun d that in th e workers the building o f c o mbs and the nu rsing o f the young and in the queens the love o f combat w ere hereditary instincts utterly independent o f experience and i n struc tion Besi des Charles Janet s excellent observations 3 show that soci al i nsect s are ruled only by o n hornets h ereditary instincts e xcited to thei r natu ral m ani f e s t at i o n by the very first experiences o f the youn g ind i vidu a l The impulse o f im itation with its variou s incitements i s only a secondary factor This i s the “ t ruth regarding th e c ap t i o n s Shibbolet h o f instruction ” and tradition i n insect communities N o doubt therefore i s l eft as to the fact that the sl ave m ak i n g habits and th e military tact ics o f th e sa n g ui n eas j ust as the soci al l i fe o f ants in gen e ral are due to i n sti n ct o n ly n o t to i n d i vi dual i n telli g ence Y e t thi s instinct i s not an absolutely blind impuls e but i s suitably modified according to the wants and purposes o f a given col ony A blind impu lse to ro b and to rear slave pupae woul d be expected to i mpel sang ui n ea colonies to ro b the more slaves the stronger and more numerou s they are themselves In the most p o pulou s nests we ought to find the greatest number . - . . , , ’ . , , . . . , , , , , . , , . , . 1 ) “ Fr g m I s t i c t i B i l g 1 8 pp 6 57 6 6 0 N h tb l tt A pril 1 896 R ssisc h s B i K S M é m ir s d l S ci é t é Z l giq d Fr c Z ur o 2 ) “ “ a vo e n n n , o o V ol . . XV I - , . u . . e n e n z uc e o e e a o a , oo o , ue . e ee an e o g e vn i k ov ” . l . c . T V III . Chap ter 72 II . a uxiliary ants In real i ty th e very reverse happens The most po pulou s sang ui n ea colonies do not contain the relatively g rea test but th e relatively small est num “ ber o f slaves We formerly ( in D i e Z usam men ge se tz ” ten N ester p 50 ) allu ded to this fact which shall now be e xplained and proved at greater l ength In order to show the connection b e tween the rearing o f L o me ek usa stru mo sa i n the sa ng ui n ea nests and th e e duca tion o f a strange cripple d kind of workers the 1 so ca lled p seu do females o r p se u do g yn e s I drew up a n accurate stati stical map o f the sa ng ui n ea colonies i n th e neighborhoo d o f E xaten I t comprises 4 1 0 2 colonies w ith m o re than nests Regarding th e numbe r o f sl aves the statistics showed that in most colonies the masters w ere from thre e to six times more numerou s than th e sl ave s Th e most populou s colonie s contai n scarcely 50 to 1 0 0 slaves someti mes ev e n l es s o r none at all I n the m iddle sized or weaker colonies ho w ever th e ab sol ute number o f slave s amounts in most cases to several hundre d Th e average propor tion of masters and slaves i n th e most populou s colonies i s fro m 1 0 0 : I to in the mi ddle sized and weak colonies however from to Nor are these the ultim ate limits assi gne d to th e number In M ay o f slaves found i n the nests o f these ants 1 890 and from 1 896 to 1 898 I found n ea r E xaten 3 several stron g sang ui n ea colonies without any slaves of . . . . , . , , - - , . . , . , - . , , . - , , . , , . i h r E kl e r g i Bi l g V l XV N 16 d 17 fr q mb r c s s v r l f F t t ly g i ) A c l y st s f t m r m t r s d is t t f r m th r i h bit d s m t im l t r t ly ll t th f th si m il r c l i s f F g i rc i bi c d ) T N rt h A m ric w m st pr b b ly r f r t h F g i rc t d ) (A d scri b d i t l t ly f r m T r S f F r l wh (C E t B l g X L V 1 90 1 p 1 ) “ ” un Die “ n , 2 ne a , en a e a 3 o n . e e o e e . e e , or e a o on e a o , o e e o a e e . en un d o s. un no e an ue n an e one o r a e e a e . a an o e e , n e a . . a is . e na e o u , u n ea san . or a e o A me den b ei en o . one o o o o o o on o F rm e rgat o gyn en sa n u n ea e e e o o o e . on o a e sa n ru u n ea an a a , un a e a n as e rva nn . oc . Wars and Sl avery i n th e A ni mal Ki ng do m 73 . similar colony I recently detected near Lu xembur g 1 90 4 O n May 2 3 1 889 I met with the Opposite extreme nam e ly a very weak sa n g ui n ea colony in which the sl aves were about twenty times mor e numerou s tha n t hei r masters These extreme cases are however very rare Besi des it i s p lain that th e number o f slaves in di ff erent colonies changes every year ; an d lastly the number of slaves in th e nests o f the sanguine sl avem ak e rs depends al s o o n special local circumstances Where sl ave nests are v e ry numerous e g i n groves o f birches and oaks there more slaves w ill be found i n the san g u i n ea n e sts than on the open h e ath wh e re fusca nests are very scarce Yet ceteri s pari b a s we find the constant law that in a given sang ui n ea nest the number of slaves and that o f masters i s not i n di rect but in i nverse p roportion My observations o f san g ui n ea nests in D utch Limbur g Rhineland V orarlbe rg Bohemia and Luxembur g everywhere confirmed thi s law H ow is thi s remarkable di ff erence b etween the col o n i e s o f sang u i n eus and o f A mazons to be explained ? The latt e r p o ssess the more sl aves the more populous th e colony ; w ith the former we meet the reverse This di ff er e nce i s expl ained by the fact that F sangui n ea i s no t li k e the A ma zons essentially dependent o n her sl aves but rather regards them a s it were as a secondary complement o f h er own comm unities The sang ui n eas rob and rear only a s many slave pupae as i s suitabl e for their colonies Weaker colonies thu s feel greater need o f supplementing th eir own deficiency by adding auxil iary forces whereas stronger colonies do no t feel the sam e necessity ; so the y re gulate their A , . , , , , , . , , . , , , . , . . , , . , - , , , , . , , , , . , . . , , , , , . , . , Chap ter II 74 . action accordin g to thei r perception o f thi s defici ency I t is true the smaller number o f sl aves in more p o p u lou s sang ui nea nests may partly b e due to another ci rcumstance v iz that i n the l atter a greater per centa ge o f robbe d pupae i s eaten than i n smaller nests N evertheless thi s ci rcumstance i s far from explaining w h y i n the weakest colonies o f this maraudi ng ant the num b e r o f slaves ev e n exceeds that o f the masters The only way of accounting for this fact i s to ass um e that these coloni e s try to stren g th en their forces by the greatest possible number o f auxi li aries T O perceive this necessity o f increasin g their numbers d o es not go b eyond th e l imits o f the i nstinctive powers o f ants A very interesting case o f thi s kind was Observe d by m e both in the summ er and the fall o f 1 898 i n my art ificial nest O f F san g ui n ea al ready repeatedl y re ferred to D urin g my absence extending over several weeks of July and A ugust th e n est had been badly cared for and had repeatedly d ried up ; consequently many workers o f sang ui n ea and the greater numbe r of the ol d slaves had perished M ean whil e n e w auxil iary ants ( F rufi bar bi s) had be en reared fro m cocoon s which I had gi ven to the N ow I observed in th e cours e o f S ep sa ng ui n eas tember that new clusters of eggs lai d by the t w o queens made their appearance i n the nest and that a number o f larvae w ere reared some o f wh ich were conspicuou s for thei r rapi d development Thi s i s an e xceptional case generally not occurring in san g ui n ea coloni es during autumn I n O ctober and the first part O n my retu rn I o f November I was absent a g ain found to my great surpris e that i n place o f the t wo . , . , , . , , . . . . , . , ,, . . , . , , , , , . , . . , , C h ap ter II 76 i t p ng strang ers ad o . O f course they are as auxi l i ar i es . , far fro m having an intelligent knowl e dge of this pur pose It su ffi ces that o n account of the actual need o f workers the i nstinctiv e impul se o f the ants to bring up fresh workers i s aroused w ith great e r intensity and for thi s reason extends to other F o rmi ca cocoons A n d thi s i s the only expl anation ad m i ssibl e for we have proved above that with F sa ng ui n ea sl ave hol ding i s not due to experience o r instruction but to hereditary instincts I s there anything i n the social li fe of high e r n i m al s which can rival thi s strange phenomenon ? We know o f nothi ng I f there had been then D arwin Z iegl e r and other evolutioni sts woul d not h a ve fai led to turn it to account an d to appeal to it a s convincing “ ” proof of the quasi human intellig e nce o f higher animal s ; for i f a n associ ation o f animal s perceives th e nec e ssity O f increasing its strength by adopting auxil iary forces an d und e r the i n fluence of this per th e n this action proc ee ds c ep t i o n actually adopts th e m from a motive ori ginati ng in sensitive experience and i s there fore i n tel l i g en t at l east according to mod e rn ani mal p sychology N everthel ess ants are sai d to be ” “ instinct automatons but higher ani mal s are not ! A n d this again show s how utterly untenable on the i s the modern notion o f intelligence and o n e hand on the other h o w fool i sh the a ttempt to place the “ ” intell igenc e o f the h igher animal s on a far higher level than th at of ants 1 B eth e indeed has o f late made an attempt to expl a in in a very si mpl e manner the proportion . , , , . , , . , , . , . , , , - , , , , , . , , , , , , , , . , , , , 1 “ ) D u e r f en z ch r i b us e en ? ” p . wir 69 . de n A me is en un d Bi en en psych isch e Q ual i t ae ten Wars a nd S l avery i n th e A n i ma l K i ng d o m 77 . b etween the number Of masters and of slaves found “ ” i n colonies of F sang ui n ea The correlation he “ says existing betwe e n the numbers o f masters and slaves i s as little owing to p sychic processes as the numerical correlation existing b etween mice and buzzards or between certai n butterflies an d cuckoos Yet it i s hard to see what i s proved by thi s compari son unless i t be the v e r y contrary of wh a t Bethe p retends to p rove ; f o r the more mi ce there are the more buzzards will come to the spot and the more butterflies the more cuckoos how e ver in the case o f sa ng ui n ea colonies j ust th e r eve rse takes place namely the more masters there are the few er slaves they have in thei r colonies ! A s th e san g ui n eas accommodate themselves to given circum stances regarding the n um ber o f thei r slav e s so al so regarding thei r spe ci es Thei r favorite slave species i s F fusca Thi s bl a ck ant i s found as auxiliary i n th e greater num b er of the above men In 2 5 t i o n e d 4 1 0 san g ui n ea coloni e s near E xat en colonies the place o f F fusca i s taken by a di ff erent species vi z F r ufi bar bi s ; 1 7 colonies have both species Near Fel dki rch in V orarlberg ( A ustri a ) I foun d si de by si de with colonies which ha d the above mentioned slaves others with F ci n er ea o r w ith F f usca and ci n er ea Th e latter species does not occur in D utch Limburg an d for thi s reason no ci n er eas are found there as slaves i n sang ui n ea nests Yet the fact that th e sang ui n eas occasionally invade w eak coloni e s r ufa and pra ten si s o f th e large hil l ants ( F ) to rob th e ir pupae and to rea r them as auxiliaries proves “ ” that thei r b l ind instinct does n o t force them to rob . , . , , . , , , , , , , , , , . , . . . . , . , . , . , . , . , . , . , Ch ap ter II 78 . automatically a certain fixed species o f slaves In “ May 1 890 I found near E xate n such a natural ” ab normall y mixe d colony containing sang ui n ea besi des F fusca a consi derabl e numbe r o f F rufa Thi s colony has s ince disappeared ; f o r o n my return after a two years absence I looked for i t in vain S ince 1 895 I found i n the same neighbo rhoo d o f E xaten fou r other natural abnormally mixed colonies o f sa ng ui n eas O ne o f them ( col N O 66 ) had only F prate nsi s a s slaves ; th e second ( col N o 1 0 5 ) F ruf o pratensi s a variety i nter m ediate b etween rufa and pratensi s w ith F fusca ; the other two had ( co l Nos 84 and 2 47 ) F pratensi s and fusca Three of thes e colonies there fore possess b e si des the ordinary specie s o f s laves an extraordinary o n e I n A ugust 1 89 1 I cam e on the A rlberg pass m ) across a 1 sa ng ui n ea colony that ha d r ufas as sl aves Forel has lon g since recorde d so m e v ery interestin g instances of nat ural abnormally m ixed coloni es of the se marauding an ts i n S witzerland namely a sa ng ui n ea nest w ith F pratensi s a s slaves and another w ith rufa The sa ng ui ne as therefore di spl ay the sam e pecul iar u ni versal i ty and the sam e gi ft o f suitable adaptation i n thei r ensl a ving habits b oth in Holland and i n Tyrol and S witzerlan d ; those qualities are due to that specific nature o f thei r sensitive cognition and appetite ” “ which we call instinct The abo v e obs e rvations o n these natural mixed colonies h ave m ade it pl ain enough why the so n g ui n eas accept the w orker pupae o f di ff erent alien . , , , , , . . , . ’ . , . . . . . . - . , . . , . . . , , . , , . , . ' , , . . , , , . , , , 1 p . 9 ) “ E tu d e s m yr méc ol o gi q ues en 1 87 5, p . 25 ( 57 ) an d en 1 886 , Wars and S l avery i n th e A ni mal K i ng dom 79 . F ormi ca species an d rear them a s slaves e ve n when 1 they are given to the m by man Forel an d mysel f . have made various experiments o n th is point with artificial observation nests kept in a roo m and w ith nests foun d in free nature It may su ffi ce to m ention o n e o f them I n the su m mer o f 1 895 several ti mes i n succession I took a large bag of worker coc o ons from a huge ant hill of F r ufa and emptied i t in the neighborhood o f a den sely populated sangui nea 2 nest wh i ch had b ut a few fuscas as slaves In a few minute s the sanguine ant s had put to fl ight the thou sand s o f rufas contained in the bag w ith the cocoons and part s o f the nest had snatched the cocoons from the mouth s o f the fl eeing rufas and began to rans ack whatever I had brought of the hostil e nest Fo r hours after hun “ dreds of these white ant —eggs were seen wanderin g from the plundered nest to th e de n o f the rob b ers an d mysteriou sly disappearing the rein By far th e greater number o f the rufa cocoo ns were reared by the san guineas Thi s artificially mix e d colony numbered in r ufas about The sa ng ui ne as and 1 896 latter w ere g enerally busy buil din g o n the surface o f the ne st and had soon given i t the ap p earance o f a tru e rufa nest A t the l east di sturbance however thousand s o f light re d sang ui n eas woul d dart out from the interior t o defend thei r common ho me ; and thus the suppose d rufa nest was turned into a sang ui n ea nest as i f by ma g ic Becau se ants kn o w no other home than that i n which they have deve loped fro m the cocoon these ruf as although they are in the maj ority . , . . . , , , - . , . . , , . , - . 1 ) F r mi d C l y N “ , , , ou o on s o . e la 39 S iss u of e, th e p . 258 ff s t t ist ic l a a . m ap . Chapter II 80 . will faithful ly serve their ravi shers and natural ene ” mies w ithout reflecting o n h o w they happened to get into thi s unusual society I have had in my room for th e l ast twelve years an artificial nest Of F sangui n ea ( see p Th is col ony adopted as slaves the workers Of al l the F o r mi ca species to be found in Holland vi z F fusca rufi “ ” b ar bi s rufa and pra ten si s Th e slaves hav e devel Oped from cocoon s which I had put int o th e nest during recent years I n free nature the same F o rmi ca s p ecies are foun d as slaves in the sang ui n ea nests but only o n e o r two of them at a time ; in thi s nest however they were al l united to form one c o l ony under th e suzerainty Of F o rmi ca sang ui n ea ” ” “ “ Yet thi s suz erai n ty an d sl avery i n the mixed colonies o f ants i s altogether di ff erent from what the sam e terms imply whe n appli e d to human society O nly authors like Lu dwig Buechner m ight be found gu ilty o f c o n founding i de as to such a degree There i s perfect eq ual i ty among all th e workers o f a mi xed colony no le ss than among al l th e workers o f a ” The very sam e constitutional l aw s si mpl e colony are i n force both fo r masters and sl aves ; in othe r “ ” words the uni for m nest sm e ll which adheres to all ants re ared in the sam e nest se rve s them to recognize o n e another as members o f the sa m e ant community the di ff erences in speci es being totally di sregarded The so —called slaves l ive enti rely free in the nest o f t h ei r ravishers that i s to say they l ive according to the same innate instincts which woul d have formed thei r rule o f conduct at home ; they work for th ei r suppl y them with food and rear thei r Off ravi shers , . , , . . , . , . , . , , . , , , . , . . , . , , , , . , , , Wars and Sl avery i n th e A ni mal K i ng dom 81 . sprin g as i f they were in their o w n colony They are “ called sl aves only becau se they are reared from robbed pupae live in the nest s o f strangers and work for t h em O n th e other hand the sang ui n eas are “ called masters only for the reason th at they have robbe d the pupae o f an al ien species from which thei r auxiliaries originate ; and besides because these mixed colonies contai n not workers only o f F san g ui n ea b ut al so thei r males and fem al es whereas Thi s the slave speci e s i s represented only by wor k ers i s why in m ixed co lonies the p ropagation o f the masters i s ensured but not that o f the sl aves There fore it i s downright nonsense for Bu echner to pl ace slavery among ants and h uman slavery on essentially th e same level By Virtu e o f hi s i n t ell i gence man possesses the power o f refl ec ti ng o n his o rigi n an d social position ; he i s gi fted with sel f co n sci o usn ess ; accordingly h e consi ders slavery as an unj u stifie d deprivation o f freedom a state o f humilia tion a degradation o f hi s human dignity With ants i t i s diff erent They have neither intellect nor sel f consciousnes s and are thu s incapabl e o f pondering “ “ over the obscure question whence and whith er A s auxiliary ants they fol lo w thei r soci al instincts j ust as well as i n a nest o f their o w n species : they are a s free and independent a s any other ant o n earth Hence among slave ants there are no run aways no revolutioni sts no conspi rators no anarch i sts He who seriou sly points to the complete social i sm and communi s m o f mix e d ant colonies as mo del s for human sociali sm and political economy i s sadly i n need o f a nerve specialist . , ” , , . , , , . , , . . . , , . , . , . . . , , , , , . 6 C h apter II 82 . O n the other hand in oppo sition those animal “ ” p sychologists w h o rank the mental faculti e s o f the highe r: vertebrates incomparably above those o f ants i t i s necessary to emphasi ze the fact that n o associ a t ion o f apes or other mammal s can compare as to p sychi c faculti es with the m ixed colonies o f ants especially with th e sang ui n ea colonies The reari n g o f th e O ff spring Of cl osely allied species as u se ful members o f thei r o w n society i s an arrangement never fo und with apes The wars there fore and military expeditions o f ants addicted to thi s practice rank much higher than th e wars o f b aboons and other apes Tru e sl avery among ant s i s b ased only o n instinct not o n intelligence But anything higher than instinct i s not found i n the soci eties o f higher anim al s eith e r I n fact the d e velopment o f thei r soc ial instincts i s rather far in ferior to th at o f ants , to , , , , , . . , , . , , . , . Oth er Wars an d A ll i an ces f A n ts Th e sl ave m ak i n g expeditions o f the A mazons and sang u i n eas are indeed the most interesting ; but by no means the onl y wars wage d by ants There are many other feu ds and ski rm ishes both between ants o f di f f e re n t species an d between di ff erent colonies o f the sam e spe cies M ost o f these feuds are cau sed by di s putes about subterranean o r Open ai r bound a ries call ” “ ing fo r settlem ent at th e point o f th e sword When “ u nderneath a large stone there i s a compound ant ” nest i e wh en t w o o r more di ff erent species have b uilt thei r respective nests in close proximity they are separated by wall s o f earth No o n e ventures into the neigh b orin g realm and w oe to him i f he does ; 5 . o . . , . - , . , . . , , . , , Ch apter II 84 . a sandy r o ad n ear E x aten It fai rly swa rmed w ith fighti ng lawn ants The combatants numbered thou sands and they covered a space of about 7 0 cm by 8 cm S o dense was th e battle array that individual s coul d scarcely be di stingui shed in the mass o f war riors They formed i rregul ar clusters o f from 2 to 1 4 indivi dual s all clinging together w ith th e ir mandibles and m aking liberal u se o f th ei r stings Th e summe r he at had infl a me d the rancor o f the two tribes lon g living to o close together The battl e probably end e d with the expulsion or the utter extermi nation o f one o f the co m munities A mong m en civil wars are generally th e fiercest and bloodiest The same may be sai d o f th e wars waged between di ff erent ant colonies o f the same “ spe cies However only the heat oppressed brain o f Buechner o r Brehm coul d d e tect a closer an a logy between these phenomena A s the mal es o f certain bi rds fight f o r their breeding districts n o r allow other families o f the same species to settle there ! s o ant col onies a re wi sely compell e d by the laws o f nature to regard the di strict about th e i r nest as e xclu sively th ei r o w n o n which no other colonies o f the same speci es are su ff ere d to encroach O the rwise their wants being equal thei r foo d supplies w oul d becom e scarce H e nce a ri ses an instinctive hatred betwee n di ff erent colonies o f the same species ; whereas col different species whose mode o f l i fe and o n i e s of me ans o f su stenance are di f ferent are admitted much more easily Th e p reservation o f the speci es n ece s fiercest struggles f o r exi stence betwe en si tat es th e . ' - . . - . . ‘ . , . . . ” . , . , , . , , . . 1 ) Al tum , D er V gl o e un d si Lb e n e e n, ” ( 6 th p . 128 3 . Wars and S l avery i n th e A nim al Ki ng d om 85 . t ri be s o f the same species N ot inord inate greed i n th e individuals nor imperi ali sti c t endencie s in the trib e but higher natu ral law s are the mainsprings Of th es e ” civil wars am ong ants The p o et indeed may “ ” exclaim : There i s room o n earth for all ( S chiller ) but even i n the li fe o f ant s this beauti fu l saying i s o ften correct only in theory M any more accounts o f wars and battles among ants coul d be mentioned ; but we cannot enter upon them h ere since o u r principal pu rpose i s to call atten “ tion to a few points of comparison b etween th e i ntel ” ligence o i ants and that o f higher animal s and o f man It remains only t o b e stated that the wars o f “ ” ants s o metimes end i n an all i an ce that i s to say i n a peace ful union o f the combat ant tribes into o n e con st i tut i o n al body Th ese alliances are usuall y for m ed between F ormi cas O f the same o r di ff erent species but are most frequent between di ff erent colonies of ” “ From Forel s Fo urmi s d e l a S ui sse sa n g ui n eas and from my o w n obse rvati o ns ( see D i e zu sammen gesetzten N ester p 1 46 1 57 ) many instances might be selected The chi ef condition s for such al liances b etween hostil e ant colonies are that th e two oppo n en t s be closely allied i n species that they be almost equally populou s and lastly th at they be forced to live in close proximity and are thu s unabl e to avoi d each other Unde r such ci rcumstances their original skir m i shes gi ve way t o mutual toleration and finall y to frien dly interc o urse A superficial Observe r o f such occurrences might be led to believe that i n tell i gent refl ection had caused the animal s t o ove rcom e H e mi ght conclu de that thei r instinctive aversion . , , “ . , . , . , . , ’ . - . . , , , . . , , . Ch ap ter 86 11 . ants reason thu s : Why this u seless sheddin g o f blood ? Let u s not exterminate e ach other but live in peace ; o ur d i ff erence s are not so great that w e ca n ” not come to term s ! Yet there i s not a shadow o f proo f that ants entering i nto an alliance reason i n thi s manner The phenomenon wh ich i s i nde e d singular enough can be explained more simply and naturally from th e l aws o f instinctive sensation with special regard to th e feeler s e nsations Especially with the F o rmi ca species and among these mo st o f all with the h ighly e ndowe d F sang ui n ea the her e dita ry dis position o f th e sensitive powers o f c ognition an d ap p e tite i s so plastic that w ith pa rties o f almost equal numbers fear will b e stronge r in such cases than love o f combat Fi rst o f course by tapping o n e an o ther with their feelers they fi n d out that they are st rangers and ther e fo r e they try to avoi d e a ch other ; but i f this i s impossible the perception o f mutual si milarity wi ll gradually prevail ov e r th ei r mutual di f ference In the be g inning they live together from ne ces si ty only but they gradually acqu ire a co mm o n wh ich unite s them a s members o f o n e n est sm el l colony F rom th i s time by tap s o f thei r feel ers they recogniz e o n e another as belonging to the same hou se hol d The former opponents have u nited into o n e ” constitutional body which i s kept together by th e common nest smel l S trange though thi s mode o f communication may appear to u s who a re not pro vi d e d w ith antennae i t alone explains the fact other w is e wh ol l y inexplicable h o w the con fede rate colony thu s form ed will i n future hol d together even against 1 A n example former m e mbers o f thei r o w n col ony , . , , , . , , . , , . , , , . , . , , - . , , . - . , , . 1 ) On th e e xpl i an at o n of th e ne st sm ll - e se e abo v p e . 1 6 if . C hap ter II 88 . h ad any i dea o f consan guinity then this b ehavior o f the o l d pra ten si s of th at con federate colony during the maltreating o f thei r sisters woul d be altogether i n ex plicable O n the other hand the i nstinctive n a ture o f ant sensation will furnish a very sati s factory e x p l a nation o f this phenomenon wh ich i s i n evi dent con Yet it shoul d t ra d i c ti o n with ani m al intellig e nce not be forgotten that societi es o f apes and other high er ani ma l s have nothin g to compare with the con fe d eracies o f ants N o o n e has as yet Observed that wars carrie d on between different hordes o f ap e s ende d with a peace ful all iance between the combatants Thi s c le arly shows how w ron g it i s to exalt the societies o f higher animal s above those o f ants in the matte r o f psychic endow ments Evolutioni sts there for e such as D arwi n and Z i e g ler are sadly mi staken wh en they point to th e battl e s sometimes waged between hordes o f apes and adduce these as conclusive evi dence that the societi e s o f “ higher animal s are so closely all ied to th e primitiv e ” “ s ocietie s o f man that a little u nimpo rtant step bridges th e di ff e rence ; for first they i magine a ” “ primit ive state o f hu man society whi ch i s depi cted cou rse a s b rutal and as devoi d o f reason a s of possible ; then t o mat ch the pictu re they exalt the societi e s o f higher animal s to the greatest possibl e similari ty w ith reasonable man and finally from thi s t wofol d hypothesis they draw th e conclu sion th at human society has evi dently develop e d from the ani “ mal societi es A n d thi s i s calle d the consi stent sci e ntific application o f the theory o f e voluti on to ” man ! I f ants were en do w e d w i th reason and ri si , . , , . , , . , . , . , , , , , , , , , , , , , . , , Wars a nd S l avery i n th e A n im al K i ng d o m 89 . b i l i t v, they woul d su rely burst into a hearty laugh at “ th e se evolutionistic steps ; for a s to the d e v e lop ment o f soci a l instincts ant colonies b ea r a far closer resemblance to th e human societies than the hordes o f apes ; and yet e ven the i ntelligence o f an ant woul d be su ffi cient to understand that animal and hum a n societies are a s far apart as heaven and earth The di ff e rence between ant states and human societies i s readily acknowledge d ; but the di ff e rence between hordes o f ap e s and the p rimitive states o f man ca n n o t b e conceded because forsooth it i s against the theory of evoluti on ! ” , , , . , , , CH A P TE R AR 1 . A C H I TECTU R E I N T H E G en era l S urvey o f III A . N I M A L K I N G DO M . B ui l d i ng A cti vi ty th e o f A n i ma ls . H E hou se s o f animals are exceedingly simpl e and destined for very prosaic purposes ; th e y mer e ly serve the wants o f daily l i fe th e preservation O f the individual and o f th e sp ecies To their owners t h ey are necessary help s i n the struggle f o r exi stence ; they 1 never a i m at a rt for art s sake Thi s clearly show s that i n th e animal kingdom we can speak only meta There p h o ri cal l y Of archite cture properly so called i s mere mechani cal skill bu t not art ; and i f some t imes it s p rodu ctions bear a faint resemblance to works o f hum an a rt the aestheti c e ff ect i s never e ither i ntende d o r understood by the animal A n o ther es senti al point o f di ff erence between th e artistic skill o f animal s and o f man i s in this that with animal s i t i s d ue to an i n n ate h e red i tary aptitu de which has not first to be a cq ui red a s is th e case w ith m an A t it s bi rt h the animal i s endowed with all its artistic talents It appl ies the m w ithout p reviou s experience o r i nstruction as soon as demanded b y i ts o rgani c development and by e xternal circu mstances T h e c a terpillar o f the emperor moth S a turn i a ) b egi n s to be an a rt i st o n ly when the t ime has arrived to trans form itsel f into a ch rysal i s an d to weave a bo ttle shap e d case wherein it i s to u ndergo , . ’ . , . , , . , , , . . , . , , - 1 t o th ) T he is r ul b il d i g s e. u n i f we d of th e iv st e s r li scrip t i s de Au t a an on 90 xc pt i p t ic l d d i t i s T e c t o n a rc h i n a e of t h em of al l a re no e oe a a e on on . 92 III C h ap ter . The buil dings of animal s eith er serve to shelter the indivi dual o r e l se they are plac e s for breeding and r e a ring t h e young To the former clas s b e long the tunnel s excavated in the earth by th e serpulas the envelopes made o f variou s substances by the moth caterpillars an d th e larv ae o f th e may fl i e s as al so th e di ff erent casings constructed by the l arvae o f insects particularly o f many b utte rfl y caterpillars b e fore th e i r metam o rphosi s To the latter class belong th e regul ar n est c o n structi o ns o f animal s The most primitiv e specimens are foun d with the paras iti c 1 N em er ti n e worms I n s e v e ral ord e rs o f ins ects 2 e specially among the H ym en opt era and th e beetl e s w e mee t wit h instances o f ingeniou s and mani fol d devel o pment o f the sam e art Here we fin d the most vari o u s forms o f nests and mad e o f all kinds o f m aterial Those el e gant l ittl e domes o f mortar th e wasp s o f the genu s E um en es have built for th ei r Off spring Th ose bre e ding burrow s lined with red p oppy blossoms have be e n excavat ed by the so called rose — Those grace ful funn e l s and b e e ( M eg ach i l e ) barrel s o f leav e s hav e been rolled into shape for th e i r young by w eevil s ( Rh yn ch i tes A po d erus A ttel abus) A n d that boat adorned with streamers has b e en spun by th e great water beetle ( H yd roph i l us pi ceus) as a receptacl e for its eggs A mo ng fishes nest building i s rare We find examples o f it i n the stickleback ( Gas ter osteus acul ea tus ) and i n other fi shes p rovi d e d wi th spin e s O n th e other hand bi rds are unsu rp as sed i n the art o f nest b uil ding as regards variety both o f , . , - , - , . . . , , . , . , . , ‘ - , . , . , - , . . , , . , , 1 N t r f rsch r 1 886 sp ci lly J H F b r sc ri b d th s b il d i gs wi th ) S ee 2 ) S ee h as d e “ e e a u e e o a e e . u ” , , . n a y r N 50 p 494 S v irs E t m l gi q ues s kill adm ir b l 1 9t h e, ea ou a , o , . en e n o . . o o . , ” wh o K i ng d o m A rch i te c ture i n th e A n i mal 93 . form and o f the material u sed by d i ff erent species Wi th the mammal s ! finally nest constructions are on the average far les s complicated and artistic than with birds and insects Th e bu ildings whi ch serve to shelter an d rear the young may l ikewise be us e d as permanent l odgings for parents and o ff spring This i s th e case with social insects an d many mammal s Th u s the nest develop s into a fami ly dw el li ng O nly in relatively rare instances do animals employ their buil ding skill i n providing othe r necessaries o f li fe M any spi ders spin thei r webs not only a s a hiding pl ace for themselv e s o r f o r breeding purpo ses but they also by means o f thei r spinning glands manu factu re nets wherewith to c atch thei r p rey I n like manner the neuropterou s larva which goes by th e name o f ant lion u ses its earth funnel both a s a dwelling place and a s a trap for catching its prey which consists chiefly o f ants o r oth e r insects A mong an ts however we find the most varied and mani fol d application o f natural arch i tec tural ski ll . , , , . , . . . , . - - , , , . - , , - , . , , . f A nts In the first place ant s use thei r architectural talents for b ui l di ng n ests i n the strict sense o f the word Everybody i s more o r less familiar with ant ne sts but f e w are aware of the immense variety o f form s impli e d i n th a t apparently simple term A s there i s s carcely any material unfit f o r an ant nest so i t may assum e all possibl e sha p es and be found in the mo st unl ikely 2 T h e N ests . o . , . , , . , sh ll c si d r s b s qu t p ges 1 th e ) We u e on a en a e . mo r e i n det a il th e b il d i g s u n of th e b v rs ea e in Ch apter III 94 . l oca lities H ere it i s the size o f a thimble there the pyramids o f the ancient E gyptians are like mole h ills in comp arison i f we take into consi deration the rela tive size of the buil d e rs S ome are i n the ground i n cle fts o f rocks o r conceal e d by stones oth ers are under the bark o r in the woo d o f trees O thers again a re i n th e hollow stalk o f a plant o r in a gall nut or i n a des e rted snail shell N o w they hang high in the bough s o f a tree now in forests they rise as domes from th e l e vel o f th e ground S uch a ne st may be dug o r spun ; it may consi st o f masonry or o f cavities hollowed o ut o f the earth o r o f the wood S ometimes all these m odes o f Operation enter into the same con struction In short th e vari ability a s to fo rm style o r l ocal ity i s al m o st u n l i mit ed There i s o n e charac t e ri st i c however common t o al l ant nests viz : th e . , , - , . , , , . - , - . , . , , . . , , , . ' , , a bse n ce o co u n i o rm f a ny sh elt er a r ch i t ec to n i c systems o i rr eg ul ar n ests ar e i g vi ng f , th e to f o d g al l eri es o ff spri ng a nd rs a n th ei r a nd a n ts mmuni ca ti ng by d i ff eren t w o rl d mbe ch a an t pa ttern ; , , p en i ngs w i th t h e o utsi d e Thi s ve ry i rregu larity o f th ei r b uil dings enables th e ant s to su itabl y adapt thei r nests to any locality an d to employ any kind o f materi al in thei r co n struction The artificial and a s i t were mathematical 1 re gu larity o f th e honey combs o f bees i s enti rely . , . , - ig i ss y D Z l l b d H i g bi (i N t r d O ff b r g 1 896 l 0t h iss p 598 if ) h ff r d c ll d f t h t h r f t h h x h d r l f rm f t h b w xpl ti c g ru t r h mb s f r m i g i t pyr m i d li k b s I h i pi i t h f th p c li r f r m f t h b c ll is d ly t t h c st r ct i c mb s c h c ll b i g b il t ly i c c t i wi h t h r c lls w b s c t t d b y t h i mp ls f c m b i i g r d c ll w lls F th b r d ri g i t si gl w ll d t r d c t h ir th r ss b y g wi g ff b th si d s m c h p ssi bl wi th t p ril t h ic k c ss ry s t r gt h H c th fl t w lls f th f r m d scri be d t t h ir 1 “ ) N en e u a ax o or e e o , n e o ea ee on n e ee a re a an o n a u u o . en e o n one e as e, e ee a e s on u on o n n a a an as o o o o o un e o e o e n on e o e e e u e ou e ee e on t a e e o o n on n e u as an . e e a e - n e n e, on , o n on n o , e on er . e - ue e e o o e - o en a e s ua e a on e a e n e na ne e o ue, , e au en e er , , e o a ” a un o ne o on e an n , en an a e on o u dw un a u ne L . e - . a e e Ch ap ter 96 III . must confine o ur di scussion to its narrowest possible l imits touchi n g chi e fly on such features as are of special interes t for c o mparative p sychology G reat as i s the vari e ty o f ant n e sts still every spe cies has its p ecul iar a rchitecture di ff ering more o r less from th at o f any oth er species M any ants e g o ur small blacki sh garden ants ( L asi us n i g er) and the ‘ 1 small yellow m eado w ants ( L asi us zl avus) work al most exclusively i n eart h Thei r nests are dug in th e ground but above the subterra n ean nest th e y rai se small er o r larger domes o f e arth the stalks and blades o f gra ss that grow o n the spot serving as natu ral pillars and beam s O ther species again e g o ur well “ 2 know n hill a n t s ( F o rmi ca ruf a ) buil d so calle d ant ” hill s th e popular type o f ant nests in our northern hem i sph ere These ant hill s ma y be termed mi xed groun d earth nest bei ng combined b ui l di ng s an under — above gr o un d with a dome consi sting o f earth pine needle s scraps o f dry l eaves and stalks and other part s of plants The di ff e rent ant species whi ch buil d such ant hill s follow system s and styl es peculi ar to each Thu s any o n e with a littl e practice i s abl e to determine at once th e speci es o f the buil ders F rufa bu il ds diff erently from pratensi s pra ten si s from exsecta The u niversal tool which exsec ta from sa ng ui n ea like th e human hand i s fit for and skilled in a , . , , , . , . . , , , . , , , , . , . . , , - . , , , , . . . . , , . , , i B th f d ls N A m ric ; t h m st c mm y ll w is L p h i di l W l h ; L ig is r pr s t d b y i t v ry t th r Em c m m N A m ric r c L m ri c sp ci s f th r f g r p v ry m r s ; ) T h N A m ric m g th m t h s ts f F x t i d F d b ip F m st l ik th f F r f —A E rp i t r st i g d ip t h ills f N A m ric s ts is c t i d i p p r f F th r H M c k r ti m t itl d T h s tr c t r f th S st s f m N r t h A m i sp ci s f F rmic J 1 ) an e e 2 a e on o on o an n , c an an en . e u o e o e o e an . e ” a n er e a n us e o e e se c o o on a n e “ . . e a an ne a . e o . a s e an ne e . a e e e e an . e n o co a e . a a . on o o un a re o u u e o e on o e en e e ou a o r. es n o o e s . u . e an u a a a e ne un e , ar e n e sc u r o n e e o so es e . a re e sc r . o ou e or n e a o nu e u e er . A rch i tec ture i n th e A ni mal K i ng d om 97 . variety o f per formances i s found i n the j aw s ( mandi bl e s ) o f the ants O f course i n diggi ng burrows in the earth and i n constructing earth works they are al so a ssisted by thei r fore l e gs which help p a rtly to scrape up the sand an d pa rtly to hol d down and fasten pe lle ts o f ea rth I n closely allied species the shape o f these instruments an d especially that o f the all important too thed inner edge ( cutting edge ) o f the mandible 1 i s a s a rule so similar that the specific d i ff erence s in architectural styl e can be accounted for only by the . , - - , . - , , Fi g L ef t m an d ib l 2 . ( Wo a o e . . F r mi c r rk r ) e of Fi g 3 f F d i bl ( W rk r ) . f u a R i gh t m . an e o o . . e i sa n g u n e a . . i n sti n c ti ve p re fe rm en t o f a pa rticular styl e on the part o f di fferent ant species I n th e case o f ants ther e fore it will never do to re sort to the mechanical autom a tism of animal activities an d to explai n the di ff erences Of instincts m e r e ly by di ff e rences o f b odily organs The d e cisive fac tor i s th e psych i c vari ety of i n sti n cti ve d i s i n them selves By them the bodily organs o i t i s o n s p indi f ferent are di rect e d i n thei r various modes of Operation It i s tru e to a certain extent that the nature o f . , , , . , . , . , , See m icr sc p sys t o o 7 e, s bj i th e u . A1, c t s B th A bb s C m r o ned an d u e ’ o . a e a a re lu ci d d a . rw a n wi th th e Ze iss ’ Ch apter 98 III . th e e xterior or gans of ants wi ll al so deci de th e natu re of thei r architecture Thu s e g the l arge Ca mp o n o tus l i g n i perd us ( horse ants ) and their allied species p o s sess larger work e rs whose huge he ad an d str o ng mandibl es enable th em to cut galleries i n the woo d o f d ecaye d o r even o f sou n d tre e s A n d therefore these spe cies are remarkabl e for w o o d n ests O th e rs again among them the j et black L asi us f ul i gi n osus as th e only one o f this kin d among th e emmets of northern Eu rope buil d paper n ests by gnawing woo d fi b re and gluing i t together with the sticky pr o duct o f thei r salivary glands Th ey thu s p roduce a coarse brown papierm ach é in which they e stabl ish their ne st s Far m ore per fect are th e paper nests mad e b y several fo rei gn ants especially i n So uth A m eri ca M adagas car an d East India They resembl e irregular brown su spended from o r fast o r grey c o lor e d wasp nests Re v A S chupp ened between branches o f trees se n t m e from P orto Al egre ( S outh B razil ) S J several pap e r nests o f Cremasto g aster sul cata o n e O f which o n arriving i n Holland still contained several thou sands o f live inhabitant s S imi lar nests o f Cr e m as tog aster S ch e n ki i n M adagascar are reported by S ikora to be sometimes o f such si ze as to acco m mo date a full grown ma n From these paper nests we mu st di stin g ui sh nests wh ich are spun and do not consi st of a paper like ma terial but o f a texture like cobwebs S uch webs are constructed according to W ro ugh to n s Observations ! by an East Indi an ant P o lyrh ach i s O ther I ndian spi n i g er a for lining her earth burrow s an d A u stral ian ants of the genera Oecophyl l a an d P oly . . . , , . , . - , . , . , , , , . - - , . . . . , . , , . - - . - . ’ , - . 1 ) “ Our A n t s , p rt I p a , “ . 25 ( J o u r l na of th e B mb y o a N at . H ist . Ch ap ter III 1 00 . species e g between ants and thei r gu ests such as the club bearing beetles ( Cl avi g er) the tu ft e d beetles ( L o m ech usa A temel es) etc But even those cavities of plants which are properly not meant to rec e iv e and to lod g e ant s are O ften occupied by them es p ecially in the luxu ri a nt vegetation o f tropi cal S outh A merica A ug Forel in the winter o f 1 895 and 1 896 visite d the savannas o f Columbia whe re h e found that the nests o f by far the most of th e species belonging to 1 ei ght di ff e r e nt g e nera were built in dry stalks o f grass This led hi m to think th at in the prairies an d forests o f tropical A merica th e n ests i n st al ks an d in hollow parts o f plants w e re the typical form o f ant nests correspond ing to the climate o f that country whereas i n o u r z ones the u su a l type i s th e earth nest o r el s e th e hill ma de o f e arth and p a rts o f plants 2 Th i s cu rsory compari son o f the variou s form s o f n e sts met with in di ff e rent ant speci e s shows cl e arly enough that thei r charact e r i s conditione d by the p e culiar shape o f the bodily orga ns o f the builders but f a r l e ss than i s the ca se with most o f th e other a rti sti c i nstincts i n insects an d oth e r a nimal s The form o f the mandibles th e presence o f sal ivary glands with gluey secretions or of r e al spinning gland s indicate only th e g e neral outline o f the architectu ral styl e preferred by thei r owners O nly the di ff erent i n sti n c tive dispositions o f the bui lders d e term ine mor e exactly the Sp e cific di ff erence s o f thei r nest forms . , . , , - , . , , , , , . . ' , , , . , , . , , . , , . . 1 t “ ) r pic l “ d a 2 ) . Z ur Urw l d ” . p rt ic l ri t é s l b it t f r is d l Amé i q d l S E t m B lg XL 1 67 A d L b sw is d A m is i m l mb i h il d S c h w iz E t m l I X 9th iss N s t r d A m is Z i h 1 892 u a a ( E xt r d e s a e o an Quelq ue s F in F r o e l, ' au n a “ Mi t t e “ D ie nn . un e e e e dc a e e er ha n o e e . er e . de s a n o oc . en er . ’ en , ” o ou . m e r co u en . , , ue ss , e ue r c ’ . sc . ) en ue , A rch i tec tu re i n th e A n i mal Ki ng dom 1 01 . Within th e limits of these i nstinctive h ereditary dis positions there i s plenty o f roo m for the worker ants to gi ve full play to thei r indivi dual powers o f sensitive cognition and appetite Thi s i s why ce rt a in an t spe cies particularly those skilled in earth work or wood work o ften take po ssession Of some spot so suitable for thei r dwel ling a s to be practically hal f fi n i sh e d Thi s they fit up i n a becoming manner as a home for their colony S uch attractive spots are e g on th e heath s o f north ern Eu rope rotten tree stumps in which f o r years numb e rs o f bark beetles an d thei r larvae or other wood boring insects were kind enough to p r e pare com fo rtable quarters by carving ou t an extensiv e sys tem O f gall e ries and chambers It onl y remains f o r the ants to take possession Of the lodgings d e vou r t h e forme r inhabitants i f there be any l eft clean t h e apartments close up the superfluou s entranc e s with earth o r rotten wood and with the same mater i al s construct i f need be a f e w partitions for separate chambers I f on occupying the r e sidence th ey shoul d perchance di scover that part o f the stump i s al re ady inhabit e d by another ant colony the latter are ki ll e d o r turned out without mu ch ado I f they shoul d fail in thi s they make peace and live o n good term s with the rival s especiall y i f the latter are equal to them in fighting strength but di ff er greatly i n s iz e and means o f defen se Th e nests are separated by partitions and “ the stump i s hence forth inhabited by a compoun d ” n e st S uch stolen nest s f orm a lar g e category o f ant n e sts particularly in places where there are ma ny stones ; for al most all ant species that dwell in e arth , . , , - . . . . - , - - . , , , , , , , . , , , . , , , . . , , Ch ap ter III 1 02 . nests have a predilection f o r buil din g under stones Th i s Saves them a great deal Of work and gi ves th e whole buil ding gre a ter firmness and moreover in such a nest the heat o f the sun more easily penetrates to t h e i n terior I n he a th s a lso where stones are rather rare instances o f such stolen nests m ay occur A n e st o f F sa n g ui n ea! on which in 1 894 I h ad placed a clod o f heath serving i t h ence forth as roo f had in 1 895 passe d into t h e posses sion o f a colony o f L asi us n i g er i n the years 1 896 98 i t was again inhabited by F sa n A short time ago i n th e sam e region n e a r g ui n e a E x aten I found a rather extensi ve earth hill supported i n th e centre b y a bun ch o f h e ather and inh abited by a large colony o f F r ufi b arbi s The ants had col l e ct e d on th e su rface a sma ll heap o f dry h eather leaves a s they generally do there Th e ea rth hill it s e l f how ever j udging by its architecture wa s an o l d nest o f L n ig er which subsequently ha d been occupied by th e r ufi b ar bi s H istory i s silent as to whether the orig inal buil d e rs o f the nest had quitted i t be fore th e time o f t h e for e ign i nvasion or wh ether they were com p el l e d by force t o evacu ate i t F sang ui n ea a re a restle s s peopl e They frequentl y desert thei r nests wh ich are then taken possession o f by other smaller species ( especially T etra mori u m c a espi t um L n i g er a nd a l i en us) I have noted a num b e r o f such i nstanc e s i n m y records o f the last few years ; it may su ffice to mention o n e o f the most remarkabl e A large colony o f F san g ui n ea ( N o 7 2 of my stat map ) i n 1 895 and 1 896 had inhabited a group o f th ree nests di stant from o n e another 3 and . , , , , , . . , . , , - . , . , , . . - , . , , , . , . , . . . , , . . , . . . , . , , 1 ) C l y o on No . 1 55 of th e s t tis t ic l a a m ap . Ch apter III 1 04 . of t ati o n the hereditary instinctive activities As th e se ants i n the parl a nce o f m o d e rn animal psychol “ indivi dual intellige nc e o gy poss e ss a high d e gre e of becau se under th e influence o f thei r sen se perc eptions an d sense experiences they are abl e to adapt their innat e instinctive di spositions and aptitud e s to any ki n d so they mani f e st great a dap t i b i l i ty i n o f ci rcumstances the building o f thei r nests I have dr a wn up stati stics o f th e sa ng ui n e a colonies i n the n e ighborhoo d o f Exa ten which show that to my knowl e dge there are in thi s region about nests o f thi s ant sp e cies embracing 4 1 0 colon i es The architectu ral style o f t h e n e sts varies greatly By far th e maj ority o f them are und e rground bu ilt either belo w the bare surface beneath a loose clod o r u nder a shrub o f h e ather under a stone o r at the foo t o f a t ree In conn e ction w ith thi s u n derground earth nest there i s generally o n t he surface a greater o r smaller heap of dry l e aves col l e cted from the h e ather shrubs Th i s heap togeth e r with the earth carried o ut of the interior gall e ri e s an d the twi gs o f the shrub s supporting the whol e construe tion forms a sort o f protective dom e With large nests thi s hill someti mes has a circum fe rence o f s e ver a l meters and a height o f several decimeters ( e g in colonies N OS 2 0 8 2 1 6 but o ften i t i s rather insignificant an d sometimes it i s altogether wanting B esi des these simple o r mixed earth ne sts F san i i r trees o r oaks u n e buil ds al so n rotten stump s o f fi a g n o w under the loos e bark now in the woo d n o w in the roots S ometim es the ol d stump i s su rrounded by earth galleri es an d som e times the whol e nest i s con fined to the stump itsel f The nest o f o n e o f our . , , , - - , , . , , . . , , , . - . , . , . . , . , , . - , . - , , , . - , . A rch i tecture i n th e A n i mal Ki ngd om 1 05 . colonies here ( N O 1 1 2 o f stat map ) i s built i n a lo fty and sturdy oak i n the m oul d an d th e cle fts Of a hollow i n the tree al most a y a rd above th e ground Th ese observations Show that the sanguine ants are able to choose the most pecul iar pl aces for their nest and to adap t its construction to any loc a l circumstances This is confirm ed by the following observat ion I n the immedi ate neighborhood o f E x a ten the earth nests prevail while two k ilometers fu rth e r o r nea r the vill a ge o f G rathem the gr eater number o f nests are buil t in rotten fi r stumps becau se in that r e gion the ground i s more tu rfy and thus renders the construction o f earth w orks rather laborious N ot les s variabl e than the styl e i s the n um b er o f nest s constituting a colony Of F sangui n ea A mong th e above mentioned 4 1 0 colonies which are known to me in thi s region there are but a few that have only o n e nest Th e se are mostly weak tribe s which o n account o f the scarcity o f m e m be rs feel no need of oth er nests I n some cases however even a v e ry strong colony has onl y a single nest built in a specially conv e nient place generally at th e foot o f a fi r In such cases the coneen ( e g col 2 0 8 an d trati o n of the buil ding i s o f great e r advantage than it s division into a numbe r o f di ff erent nests H owever by far th e m aj ority o f the sa ng ui n ea colo nies have several nests avera gi ng from two to eight either close t ogether o r farther Off from another some times inhabited s imultaneously sometim e s by turn s The distance between the nests o f one colony i s mostly only from to 4 m but sometimes f rom 1 0 to 2 0 m or more The l atte r i s pa rt icul arly the case with thei r sang ui nea . . , , . . . - , , - , - . . . , . , , . , , , . . . , . , , , , , . . , . . Ch ap ter 1 06 mmer w i n ter a nd r esi d en ces, rather with th e a b o d es f o r w i n t er a n d f or spri ng ; for many but by no means all sang ui n ea colonies o f thi s country have speci al winter quarters establi shed i n thickets under the roots o f tree s o r stumps and a ff ording deep and warm recesses fo r th e col d season The spring res i d e nce however which agai n o ften consists o f several single n e sts i s generally bu ilt near the edge o f the thicket Here o n the first warm days o f M arch and A pri l the ant s can always be observed changi ng th e ir quarters and movin g over w ith th e whol e family to the spring resi dence I n S eptember or at least in the be g inning o f O ctober they change again moving i n the Oppo si te di rection I f it shoul d become very h o t and dry in summ e r the colonies move to their w inter quarters during the dog d a ys th u s convertin g the w int e r nest i nto a m i d 1 summer nest When at the end o f A u gu st 1 898 1 ha d returned a fter several weeks o f absence I found that during the exceptionally hot days o f A ugu st mo st o f the sa ng ui n ea colonie s of thi s region had aban d o n e d th e i r spring nest What had become o f th e m ? A s I was well acquainted with the winter nests o f m any colonies by th e means o f the stati stical map I h ad drawn up i n th e p receding years it occurred to me to l oo k there i n search o f them Th e resul t was rather striking : al l o f th e emigrated colonies possessing winter quarters o f thei r o w n ha d al ready occupied them ! Thi s was such a re gular occurrence that when su or , - . , , , . , , . , . , - , . , , , . , . , , c sis t s i i t pp rm s t l y r f li gh t s d wh ich t c l s s l l i t m is t r i pl c s xp s d f me ti m t t h sc rc h i g r ys f t h T h is c di t i f th s il d i s sur el y ess n t i l i n xpl i i g th f t s j st m t i 1 ) The an so c o un t a o ut on a , e ry b , o e e a e n o e E xat en on o e a s a o e a n n e ac n u e o s n su n . u u e a o e on en on e a e on . e or o e o o e o C h ap ter III 10 8 . to feel uncom fortable in thei r resi dence on the south ern edge o f a fi r plantation th e y emi gr ate bag and bag gage to th e more shady si de on the north Toward the end o f M ay 1 896 I observe d sev e ral colon i es chang ing th ei r nests for thi s reason I f the weather changes and continu e s to be chill y an d rainy they bundle up once more an d go back to the ol d home A similar instanc e I noticed on June 2 0 1 896 Th e re had been heavy showers for seve ral days back and many san g ui n ea colonies that hitherto had lived i n earth n e sts ‘ were moving into ol d oak stumps ; for these a fi o rd e d them a better shelt e r against th e p e netrating rai n s “ ” Those wh o d e si gnat e a s i n tel li g e n ce every sui table change i n instinctive activiti e s caused by sense percep tions an d sense exp e riences in a n imal s can hardly escape from crediting a n ts with rathe r a consi d e r abl e degree o f animal int e llige nce for even i n th e h ighest “ mammal s we hardly find a h i gher degree o f psy ch i c ” than i s ma n i fest e d i n the above e xampl es pl asti ci ty by the sanguine sl avem ak ers However w e hav e already shown in a form e r essay ( Instinct an d In tel l i ge nce in the A nim a l K ingdom ) th a t it i s e n tirely “ w rong to appl y th e t erm intellig e nce i n thi s man ner ; for th e phenom e na i n question can b e fully accounted for by i nstinctive sen sation and therefore they do not supply th e l east evid e n c e i n favor of intel l i g e n t mental activity o f the animal M an o f course in observing such phenomena can attribute to the ants “ the following reasoning : Fo r th e last few da y s it ha s been raining a great deal We and o ur children have be com e dripping wet N o w we do not want to get wet again ; there fore we m ust move to another dwell - , , , . , , . , . , . , - . , , , ! , . , , ” , . , , . . , , , , , A rch i tec t ure i n t h e A ni ma l K i ngd o m 1 09 . ing where the rain can n o t enter ; those o l d o ak stumps however are j ust th e thing ; th eref o re we ” move to that place — W e however maintain : Wi th o ut admitting animal intelligence the whol e affai r i s explained much better from the instinctive association o f sens e representations Th e ants do not like th e o l d pl ace any more on account o f the disagreeabl e th e re fore they look for e xperiences u ndergone the re another That under these circumstances j u st those dry oak stumps appear to them to be so very inviting follows from the suitable di sposition o f the sensitive cognition and appetite That ants in such cases are , , , . , , . , , . - , . i t h s f f ch a ng e o f n ests i s an unwarranted assumption to which we r e ply : q uad g rati s asseri tur g ra ti s n eg atur In oth er words : we are n o t allowed arbitrarily to attrib ute a human course o f reasoning to animal s i n the “ ” sens e o f popular p sychology S uch men as L ” “ Buechne r m a y find a proo f o f th e high intelligence o f ants in the fact that e g in low lands L epto th o rax but in the a cerv orum resi des und e r barks o f trees 1 A lps under ston e s A lthough w e co nsi der the power o f adaptation m ani fested by the sang ui n e as in thei r nest building insti ncts far more deserving o f admira tion yet we are far from regarding even thi s powe r as an instance of ani mal i ntelligence but rath er o f anim a l instinct the variou s activities o f which depend neither i n tel l e c tually co nsci o us sui ta b l en ess th e o o , . , . . - , . . , , . ‘ - , , , , , Thi r x L pt th m rr th R m i hi b k D i G ist i g E p 2 68 w s r ly r f rri ( L ipzi g B c h r b c s h s t ill m r rr 1 au o o e ue c r c lls ) B ue hne n o s ist sl b , a cerb oru m. e oo au e e e “ e , , e en d er as e e e u e o e p e e, a c e r vo r u o ra . , ne Ge , e a an es r e e . th is b k th e oo sly L i m g i m Thi i h t wic k l g t th s m p ss g f sly c lls th t t L i o n eo u n e In 73 . n o ne o u as us a ce r' vo ru un o e r re c e a a e a a an a e . ” o as us Ch ap ter III 1 10 . mechanical automati s m no r o n indi vi dual refl ec tion o f the animal but o n the su itable di sposition o f i ts sensitive co gniti on an d appetite True th e p lasticity o f the buildin g instinct i s greater with the sa ng ui n eas than w ith their allied species ; yet even the latter sometimes p e r form actions that go to p rove cl ea rly that the nest buil ding i nstinct in ants i s not blind mechani sm but i s suitabl y modified by thei r s ensitive cognition I obse rved a striking instance o f thi s kin d i n th e summer o f 1 898 at Lipp spr i nge i n Westphal ia In a growth o f young fi r trees n e ar th e so called Fish e rman s hut th ere l ay a small h eap o f o l d p ieces o f tar paper Thi s treasure had be en di s cove red by some F o r mi ca trun ci c o l a N yl which h a d their n est at a di stanc e o f 6 4 m in a fi r pl antati on o n the other si de o f a broad san dy road Th ei r nest was a normal trun ci col a nest a hi ll o f fi r needles and earth built around a fi r sapling Now the ants were b e tter please d with the newly di scovered place under th e ta r p aper than w ith thei r o riginal nest therefore they moved over bag and baggage ; and the moving lasted several wee k s The tar paper a ff orded them in a far higher degree the advantages u sual ly derived from thei r sur face domes cal led ant hill s f o r under th e layer o f tar paper warmed by the rays o f th e sun there was a u ni forml y hi gher temperature and at the same time an e ff ectu al sh elter against the rain Th ere fore they establ ished th ei r nest under the tar paper w i th out surmountin g i t by a hill When I returned to Lippspringe at th e end o f M ay 1 899 the trun ci c ol a nest w a s st ill under th e t ar paper no indications o f any b uil din g be in g visibl e above ground Thei r fo rmer on , . , - , , . - . ’ - - . . , - . . , - , , . , - , , , - . - , - , , . - . , , - , . Ch apter III 112 . g ui n ea selects f or its nes t a more hi dden place than a stronger o n e does Thi s i s esp ecially the case i f there liable to a re hostile ant species in the neighborhood pay th em a visit at any time Thu s colony 1 66 o f my stati stical map o f E xaten b eing harass e d by neigh boring pra tensi s had at last hi dden its e l f so wel l in th e earth that I was obliged to sp e nd a consi derabl e time be fo re finding it I m ysel f have often e nough b e en vexed t o se e th at coloni es o f th e s ame sa ng ui n e a o n being di sturbed even by the hand o f man emi grate and seek el sewhere a new pl ace o f settlement S ome time s even a clod o f heather placed o n their n e sts will cause wea k er coloni es to emigrate Thi s i s all th e more strange since ou r sang ui n ea i s very fond o f u sing su ch clods a s a roofing for her nests O ther colonies indeed di d n o t emigrate on account o f m y repeated vi sits but tried to retire farther into the interi o r A striking i nstance o f thi s kind was o ff er e d by c o lony N o 36 which was o f moderate di mensions O riginally the exterior o f th e nest looke d l ike any commo n earth nest o f the same numerical strength Th e clod wh ich I h ad placed o n it was u sed as a roof an d was covered by a h eap o f dry heath er leaves I o ften visited the n e st an d each time I l i fted the clod to have a view o f the interior o f the b u il ding In con sequ ence the ants blocked up the form e r entrances ; they dug new one s at a greater di st ance from the nest and came to the su r face much more rarely Even th e small h eap o f material s gathe red from plants gradually di sappeare d from the t 0 p o f their nest A fter a time it was blown o r wash e d away n o r di d the ants renew it It was evidentl y instinct that led . , , . , , , . , , . . , . , , , . . . , - . . . . , . , . A r ch i tecture i n th e A ni mal K i ng d o m 113 . them to withdraw from these repeate d d i sturbances by closing up and concealing thei r nest 1 P ro fessor A ug Forel relates that h e had brought hom e from A lgeria a colony o f M yrmeco cystus al ti s Z u ri ch ; an d place d it in hi s garden at but u a m i e s q owing to the trouble cau sed them by the small ants L asi us n i g er and T etram o ri um ca espi tum they grad ual l y modified thei r u sual manne r o f nest construction Under normal ci rcumstances thi s M yrm eco cystus species ha s wi de open nest entrances ; in this ca se however they were contracted to a ff ord greater p ro t e ct i o n against the thi e vi sh vi sitors an d finally they were almost entirely closed up T h l S instance i s sim i l ar to the o n e recorded above o f colony 36 o f F sang ui n ea an d i s psychologically to be explained i n the same way The repeated d i sagreeable experience s cause d to the ants by the troubl esome strangers induced the M yrm e co cysti contrary to t heir former habits to close up and to conceal thei r nest A s Forel point s o ut these fact s afford i rre futabl e evidence th e great plasticity o f ant instinct Fo r thi s of instinct i s not m e rely a nervous mechanism forced to operat e along uni form lines ; it i n clu des s ensitive cog n i ti o n an d appetite which are not only o f an organi c bu t al so o f a p sychi c nature Thu s animal s are enabled by new sens e perceptions and experiences to adapt thei r w onted m ode of a ction to the require ments o f ci rcumstances Th i s does not howeve r compel us i n the least to attribute to anim al s a power of cognit ion e ssentially the sam e a s hum a n intelligence . . . , , . . , . , . , , . , , . , , . 1 8; ) se e a u th o 1 “ r L e s Fo rm i c i d es d e l a a . 8 ls o “ A p rc e u de , P r vi c o n e P syc l gi c ho o e d Or a n ’ om p ré a e, ( ” L s p 24 b y , au a n n e , . , th e s P . me a Ch ap ter III 1 14 . in fact we cannot even do so i f we wi sh at all to p roceed scientifically P opu lar psychology may “ indeed perc e ive a spiritual pow e r o f refl e ction in those activiti es of animals in which s e nse experienc e s enter as additional factors A n d o f course thi s uncritical procedure forces them in consequence to “ ascri b e to ants at least th e sa m e degree o f i n dividual ” intelligence as to the highest mamm al s ; for with the latter gr e at plasticity o f instinct i s rar e r than w ith ants These conclusions which are declared absurd by m o d e rn evolutioni sts th e m se lves clearly p rove th e unt e nability an d sel f contradiction o f modern ani mal p sycholo gy , , , . ” , , , . - , , , . , , ' - . 4 . H o w d o A n ts B ui l d Th ei r N ests? In spite o f its i rregularity e very ant nest i s always a unit con si sting o f one o r mor e chambers g alleries and ent rances by whi ch ants co mmunicat e with the out si de worl d A n d now we a re con fro nted with the question : H o w do the members o f a colony co 0 pe r ate in buildi n g th eir nest ? 1 A lm o st a hundre d years ago P eter Huber atten t i vel y observed the ants buil ding th e i r n e sts and described i n a masterly manne r th e skill and assiduity o f these sm a ll animal s A n y one can sati sfy himsel f o f the correctnes s of the se observations by watching wood ants ( F r ufa ) buil ding th eir h ill s on som e sunny day in spring or by l ooking at the small black garden ants ( Lasi us n i g er ) const ructing their earth nests during some w arm spring shower , , , . - , . . , , . 1 ) “ N v ll ou e R c h rc h s e e éd e e iti on , su r 1 86 1 . l e s mo e u Ch p I a . . rs des r is i d i ge s f ou m n ne C h apte r III 116 . thu s interprete d by writers o n popular science and made to serve as a beauti ful pr oo f of animal i n te l l i gence This kin d o f arbitrary mi srepresentation o f th e plainest fact s can cert ainly lay n o clai m to any scientific value How then do ants build their n e sts ? They adapt th e mselves to gi ven situations an d prudently t ake into account the va ri ou s circumstances Wh e n in spring a gentle warm rain b e gins to r e nder the dry soil so ft and manageabl e im m ediately the earth worki n g ant speci es are ki ndl ed with new zeal for buil din g These assi duou s l ittl e a n imal s wi ll th e n sally forth from their ne sts by hund re ds and place p e llets o f ea rth u pon pellets t o buil d new gall e ri e s and chambers avail ing themselves o f blades o f grass twigs o f heath e r pi e ces o f l e aves and other natural prop s as pillars or vaults Fo r the sam e purpose su ch auxiliary material s are al so first dragge d to the spot In th is connection the s angu ine sl ave m ak e rs give evi dence o f e minent skill i n combining timber work wi th masonry It i s especially rema rkable with earth working ants that th ey accommodate thei r instincts to the changes o f t e mperature an d moi sture Th i s cou ld be a scer ta i n e d constantly i n glass nests i n which I k ept under observation small colonies o f L asi us n i g er T et ra mo I f the mois ri u m c a espi tum and M yr mi ca sca bri n o di s ture o f the nest became too great the ants would set to work and pile up the earth in the shape o f a dome perforate d by innu merabl e openings making it app e ar like a sponge ; thu s th e eva p oration o f the w a ter w a s facilitated B ut when the moistu re d e creased to o , . . , , . , , . , , , . . . - . - , . , , . , , . e A rc h i te c ture i n t h e A n i ma l K i ng d o m 117 . much and the nest threatened to dry up a change to th e opposite was e ff ected ; the nest was constructed as flat and as low as pos sible with very few op e nings o n the sur face The propriety o f such p roceedings i s cer t ai n l y striking O ften enough th e same can be observed also i n natu re both i n those speci es that build only domes o f earth an d i n those that build regula r ant h ill s It i s a fact even noticed by farmers and ascertained by mysel f repeatedly that i n dry and h o t summers the hills o f wood ants are lower and fl a tt e r than i n moist and col d summers The first way o f bui lding i s for the purpos e o f reducing evaporation t o the low e st l imit and to offer to the h o t rays of t h e sun bu t a smal l su r face to shine upon ; o n the other h a nd the high er an d the more vaulted the hill s are the easie r i s the drainage i n case o f rains and the gr e ater are th e evaporating and h eating sur fac e s Ind ee d ants woul d have to be very i n telli g en t i f th e i r o w n r e flection shoul d lead them to mo di fy thei r nests so prudentl y Yet consi dering that the d o me sh ape for the nest i nclude s i n principl e these qu as i i nt e l l i gent adj u stment s t o the vari ations o f temperatu re and moisture which can b e traced in consequence to the bu il ding p roper to the ants in spe ci fi c manner o f question it i s clear that i nsti n ct and not i n tel l i g en ce i s the gui ding principle ; for the sp e ci fic plan o f th e building i s no doubt i nsti n cti ve as i s acknowledge d at least by scientific authors I n adj usting however thei r instincts to cha n ging circumstances the animal s are influenced by sensitive perceptions and e xp eri e mees which are no thing el se th an the n atural ex er ci se of th e sam e i n sti n c ti ve p ow er o f cog ni ti o n o n which i s , . . , , - . , . , , , . . , , . , - , , , , , , , , . , , , , , C h ap te r 118 111 . based the specific mode o f buil din g in any species o f a nts Why there fore introduc e a forei gn eleme n t called i ntelligence between this hereditary disposition and its changeabl e application ? I should think it i s far more simpl e an d natural to acco un t f o r th e w h o l e . , , , , f a n a n i m al by o n e a n d th e sam e pri n ci pl e Unles s you m ista ke instinct f o r mech a n ical automa t i sm i t i s by no means necessary to as sume animal i ntelligence i n order to explain the above phenome na Let u s now compare the arch itecture o f ants with that o f birds Th e re are several important di ff erences 1 The nests o f birds are more arti sti c and regu l a r yet th e y are st amped w ith the unmi stakabl e marks of monotony and uni formity within the same sp ecies they a re p roduct s o f instinct in the strictest sense o f the t erm M oreove r as A ltum ha s ad m irably proved the architectu re o f birds i s a function o f th e i r br e eding instinct I t be g ins at a certain stage the development o f thi s instinct ; both reach of thei r cl imax at the same time an d then grad t ogeth er O n th i s account th e n e sts u al l y vani sh for the first h atching in spring are as a rule built b e tter than those l a ter in the season In thi s case practice doe s not form th e m ast e r but the bungl er With ants however archit e ctu ral skill i s found in th e workers throughout thei r l i fe it i s suitably carri ed in to ac ti vi ty o . , . . . , 2 , . , . , . , , . 3 . , , , By B k st J h rb ch 1 au “ ) un u a 2 3 “ ) S ee en ou ne W V gl h as a rt ih r auf o w hr en a I ” . f t en been en e x gg r a W e rt S . ee z u ru e c k g e f u e h r t , 1 98 ( 1 885 at e d ma n n o e un d n - a u “ , e n n er a n o o e e t en e a ea e , a o n o - . . on e et e . “ D ie in . si Lb p 1 63 if (6 h b t i s ls m g th C l pt r h i g si m il r s t b il d i g f t h l f r lli g b l ( R h y ch i t b D T ri c h t rwick l r p 7 8 ff o met as V o e ge l is d e r N a t u r w i sse nsc h S ) th w ay , der D er i g i s n th e e . e o eo n e a es in th e e tu l a e ) . C h ap ter III 1 20 . ”1 they d isgu i sed thei r nest The v isu al resemblance between the white tree li chens and the paper scraps which impressed the sensitive power o f percepti o n o f those ch afli n ch es explains quite naturally th eir seem i n g l y i ntellig e nt proc e eding 2 He who concu rs with D a rwi n i n attributing intel l i g e n ce t o birds when th e i r actions are influenc e d by sensitive cogn ition mu st credi t ants with a still high e r d e gre e o f i n telligence ; for i t cannot b e d e nied th a t bi rds i n building th e i r nests show far more specific uni formity than individual variability whereas i n ants as a rule the contrary i s the case ; with th e m the psy c h i c pl asti ci ty o f the nest building instinct i s no d o ubt much gr e ater Y e t the chi e f point o f e xcel lence whi ch distin g ui sh e s the architectu re o f a n ts from that o f birds i s th e n umber of uses to which it ma y b e pu t Birds bu ild n ests t o serve as pl ace s f o r h at ching thei r young only ; except during the pai ring s eason bi rds do not know th e i r nests n o r doe s i t ever occu r to the m to use them a s dw e ll ing places With ants howev e r nests serve as permanent abodes for the whole family and o ften al so for strangers of di ff erent species which are hospit ably received as guests Finally ants u se thei r architectu ral ski ll for m an y other pu rposes But be fore entering into particulars o n thi s head w e woul d like to draw a comp a rison b e tween th e architecture o f ma mma l s and that o f ants In as far as the b uildings o f many mamm al s a re . - - , . , , , , , , , ” - . , . , , - . , , , . , . , . 1 by h ad ) Ch . D rwi a me n t to o , n, i s lr w h ic h i s t m pl y d ( 1 b p p 414 ) L H e w i t so n , ee n 2 . o e e in . , . n , e . . e . , . on e ad a o f e ad y lic h st f s s h r ds a ne en , o e scri b d p p r l ik wis a c h a fli n c h of a e de e e e A rch i te c ture i n th e A n i ma l Ki ngdom 121 . only nests but also p e rmanent dw e llings both for the p arents and the young they bea r a closer re se mb lance to the nests o f ants than t o those o f birds Instances are pl e nti ful ; for the burrows o f badgers fox e s and wild rabbits are well known In some cases the sam e buil dings s e rve also for storing p rovisio n s as i s the case with G erman marmots and moles Thes e buil dings therefore by their gre a t e r universality o f purpose are more similar to ant nests th an to bi rd nests A nother poi nt o f simi larity with the former i s i n thi s that they show with some species at least a great e r individual variability an d less sp e cific uni formity th a n the latter N everthel e ss i n all th e se respects ant nests by far excel the buildings o f mam mal s The very highest vertebrates th e anthropoi d apes scarcely m a ni fe st a trace o f building instinct o r o f its intelligent appl ication unles s you wish to mention th e sleeping pl a ces somewhat resembling 1 r e gular nests which O rang Utans are wont to buil d on trees A lthough the brai n o f ap e s mos t resembl e s ” “ that o f man yet th e most intelligent a rchit e cts among m a mmal s are found not among th e apes but am ong the rodents which i n devel o pm e nt o f brain a re far i n f e rior B eavers a re the only h ighe r anim a l s whose a rch itecture can b ear comparison with that o f ants The buildings o f beaver families consi st o f an und e rground chamb e r and burro w resembling those “ — o f other ma mmal s and o f a so called lodge Th e manner i n which th e latt e r is bu ilt was ably describ e d no t - , . , . , . , , - , . , , , . , - . , , ~ , - - , . , , , . . . - . , 1 Exp d i i i t r ti e n e Z l gisch S k izz C tr l B r r ( C mp t p 224 ) S e e B ue t t i k o f e r na t on on a na l ch de oo o , en a . - n eo o . en e ” o e a us d e r N i e d e rl a e n d i sc h e n endu du 3me C g r es on Ch ap ter III 1 22 . by Fri edri ch i n a recent publi cation The beaver lodge is noth ing but an accumulation of brushwood above the op e ning o f the underground chamber which i s the real center o f the whol e dwelling Wherev e r b e avers a re living i n coloni e s and when ci rcumstances favor the full development o f thei r instinctive skill i n 2 buil ding th ey co n struct thei r w ell known dikes t o d am the water and sometimes th e y even buil d can a ls f o r the tra n sport ation o f timb e r A lthough th e se works are the resul t o f the co operation o f s e veral fa mi li es yet each pair works only for its own pur poses ; th e re i s n e ve r any d ivi sion o f labor like th a t in ant colonies O f cou rse observers like Lewi s H 3 M organ who m i st a k e for intel lig e nce every acti o n due to s ensitiv e cognition di scover many proo fs o f h igh intelligence i n the doings o f the A merican ” beavers However thi s so called free int e llig e nce i s nothing else than the power o f adapting th e i r b u il dings to the change s o f situ ation Thi s pow e r is poss e ss e d al so by ants in at l east an equal degree I f M organ and Romanes ! e g regard it as an infallible p roo f o f the intelligence o f b e avers that th e y regul ate the level o f th ei r ponds by w i dening o r narrowing th e ” they should o r ific e s o f thei r dams as t h e case m ay b e admit the same i n ants which regulate the d e gre e s o f moi stu re an d temperature o f thei r nests by changing 1 . , . - , , . - , . , . , , - . , . . . . , , , i l r E l b ( D ss p 20 cc r i Fri ric th y ls cc r t s m pl c s b k s f t h mi d d l E l b l t h gh i d d s m ll r sc l f r d i s t i c t c m m b th t t h E r p th y t A m ric b vr th Th A m ric B v r d h i W rk s ( Lippi c tt ) ) D i e B i oe r an d e r m tt 2 ed h ) A o d n g to “ 1 an o e o e 4 e ar e e an “ 3 ) e “ ue ea o e e e i lI n te An ma e, e e a ou a au , e o o n n n an e e n o u ee on on o if . a o a e a o a e e on e a e u o . ; the the e an r e an d . an ea lli g c en e e an ( 6 th ed s ) , p . n o 37 7 ff . o Co . , C h ap ter III 1 24 . where they visit the i r p l an t l i ce and scal e —insects to “ ” milk them by caressing them w ith thei r feelers A few Eu rope a n a n ts n a m e ly F o rm i ca r ufa pra tensi s and L asi us f uli g i n o sus buil d regu lar streets cleari n g away from thei r path al l vegetabl e growth to a di s 1 tance o f sometim e s from 2 0 to 50 m Thes e streets l ead from thei r nests into woods and bu shes and thence ” branch o ff to the pastu re grounds o f their cattl e O ther ants in parti cular L as i us n i g er an d Cre mas tog ast er scu tel l ari s bu il d cover e d roads o r tunnel s o f earth by wh ich their nests communicate with tr e es an d bushes that are inhabite d by aphi d e s o r scal e insects These they occasionally surr o und with earth r a mp a rts i n ord e r to k e e p them toge ther and t o p ro tect th em from other ants by who m they might b e “ i l a n t l coveted an earth con S uch a c e pavilion p struction th e size o f a hazel nut i s i n m y collection ; i t was built by M yrm i ca scab ri n o di s at the top o f an twi g in the n e ighborh oo d o f E xat en O ther ants o ak — e g the A frican D oryl us species dig subt e rran e an tunn e l s wh e re they go for thei r prey consi sting chi e fly o f ins e cts and worms The h a rv e sting ants o f S outhern Europe Western A sia North e rn A frica A merica and India establi sh granaries i n thei r nests wh e re they st o re up th e i r provisions for w int e r o r sum mer T h e A tta o f tropical A merica feeding o n mush rooms u se a numb e r o f subterranean chambers as ve g e t able gardens and hot —hou ses i n whi ch the mu shroom s . , , , . - . , , . , ” - . , - , . . . , , , , , . , , , , . , , , sp ci lly th l r g r sp ci s f f A m ric l tt i g cc rd i g t B l t Br t th t s ( A t t ) w h ic h d F r l b il d si m il r r d s b t f r q t ly f s t ill m r c si d r b l l gt h d b r d t h T h s m t r d s w fi d i N rt h A m ric wi t h t s f t h g p f F r f sp ci lly wi t h F r mi c t id 1 ) A mo n e a an e an o e e fo ea r ig e ~ n cu u , o an t n ea e r ou s th e r e are oa o u , e . e e a an a an en an g . a , uen e e an u a, e a - e oa a a e a o e o n e o a e o n n o e o a e o e en , e on e e xse c o a es . A rch i tec ture i n th e A n i mal K i ng d o m . are g ro wn A nts employ thei r building skill also to protect them selves against enem ies They raise ram parts and barricades to keep o ff foreign invaders ; and unwelcome visitors which cannot be got ri d o f in any other way are simply wall e d up with earth and are thu s kept at a di stance Th us i n one o f my obs e rva tion nests o f F sang ui n ea a sal amander introduced by me wa s in a short time entir e ly walled in Th e slaves ( F f usca ) p a st m a sters in the art o f building were most zealou s in thi s w ork A n occurrenc e f a r more amu sin g took place i n a nest o f L asi us fl avus to whom I h a d giv e n a L o m ec h usa stru m o sa a s guest The small yellow ants were not at all pleas e d with the unwi e l dy fellow and tried to ge t ri d o f h i s impor t u n i t y in t h e f o llow ing droll manner Fro m all qu a r ters they brought together pellets o f earth and he ap e d them up o n th e back o f the un fortunate b e etle unti l nothing wa s to be seen o f hi m bu t the tip s o f hi s 2 feelers A nts are ev e n supposed to h ave thei r cemeteries and burial places S uperfici al observers have ci rc u lated m a ny fables o n this subj ect In the book o f a certai n Reverend White ( A nt s and their Ways L o n I found a touching story by M rs Lewi s do n Hutton o f S i dney which i s really too characteri stic o f thi s kind o f n a tu ral h i story to be pas se d over in silence O ne o f her children had sat down o n an ant nest an d ha d b e en assailed by the enrage d inhabitants A t the 1 . . , , . , . . . , , . , . , , . , . - . . , , . , , . - . 1 J M ll r ) oe e D i e P i l z g ae rt e n , an d ( en a i m C o l u m b i sc h e n IX , , 2 in iss 9t h “ ue ) ) D ie B o i l . i , p n te . r F r Urw l d o el “ , a 40 6 i Z ur i ig r e e n F aun a ( M i tt e i l . su e d a L b sw is d S c h w iz E t m un d de r me ri k an i sc h er A m e e e en . e e n o er is A me en is en . . l B zi n at o n a e n 1 892 , e p . 65 3 eh un . g en vo n L o me c h usa st r u m o sa, Ch apter III 12 6 . cries o f her chil d th e mother ra n to the spot and killed a f e w score o f ants A short time after she saw the co rp ses surrounded by a nu mber o f thei r co mpanions The bu rial ceremonies be gan A d eputation o f ants was d e spatch e d to the n e st to fetch the train o f mourners They marched i n du e order t w o by two to the sc e n e o f di saster They took up the corps e s m arched slowly i n procession to a san dy place i n the n e ighborhood and bu r i e d them o n e by o n e A few o f the gravediggers which tri e d to escape thi s dole ful duty by fl ight wer e pursued by the other ants over taken and summarily sent e nced to death The se n tence was immediatel y carried o ut an d the criminal s were all interred i n a common pit The sai d lady maintains to have witness e d similar p roce e dings mor e “ th an once Ge rstaeck e r in h is Repo rt o n the scienti fic ” r e sults obtained by Entomology during the year 1 86 1 mentions thi s burial story ( p 1 56 ) with the follow “ ing i roni ca l rema rk : To rende r the m ysti fi cati o n compl ete nothing m ore was lacking than a funeral ” sermon hel d by o n e o f the ants S trange to say 1 P erty attempts to defen d the imaginative lady against “ Th ere seem s to be some Gerstaeck e r by saying : truth in it anyway for D upont al s o m a intains that ants h ave common graveyards at some di stance fr o m ” thei r buil dings whither they carry their dead 2 Ernest A ndr é wa s f a r more correct about those bu rial c e remonies o f ants i n calling them phantastic m i srep r e se n t at i o n s o f the commone st occu rr e nces It seems scarcely poss ible that such an anecdote should see . . . . . , . , , . , . . . , . , , , , . . , 1 2 ) “ ) “ S l l b Thi r r m is ( P ri s e e en e Le s f o u en der ” e a , e (2d p p . . 32 8 . Ch ap ter III 1 28 of . . su ch disagreeabl e obj ects It i s utterly useless to e mbelli sh the l i fe of ant s w ith f a bulous anecd o te s l ik e that A u stral ian burial story The col d facts are inter esting and wonder ful enough . . . 6 Is th e A rch i tec ture f The bu ilding instinct o f ant s proves t o be such a universal faculty an d its application to variou s pur poses i s i n many cases seemi ngly so intelligent that we a re finally confronted by th e qu e stion : Wh y sh o u l d w e n o t cal l th i s a n i n tel l ec tu al f a cu l ty ? Th e following discussion will probably throw some light o n th e subj e ct Woul d it not be a proo f o f intelligence i f ants not themselves provi d e d with spinning gl ands employed th e i r larvae for manu factu ring threads by means o f which th e y bu il d a nest o f leaves ? A ccord ing to W D Holland s observations thi s i s done by a large reddi sh yellow ant o f E astern A sia call ed Oec oph yll a smarag di n a whose nests he stu died i n With thei r m andibles the ants first bring into Ceylon the proper position the leaves to be conn e cted and keep them th ere ; then others approach in large numbe rs each carrying a larva in its mouth with which they be g in t o move a cross the leav e s from side to s ide Whereve r th e mouth o f the larva touches the l e a f a thread appears sticking to th e lea f Thi s process i s continued until the l eaves are attache d to o n e anoth e r at thei r edge s by a firm ti ssue o f threads an d final ly a vi scou s paper like stu ff is form e d consi sting of innumerabl e threads crossing each other i n all d i rec . A n ts Gui d ed by I n tel li g en ce ? o , , . , , , , ’ . . - , , 1 . , , . , . , , - , 1 ) E Pr c o , E . i gs ee d n G r of ee n , th e On E bi t s f O phy l l l gic l S ci t y f L d th e n tomo o ha a o o e ec o o on s ma r a g d i n a a on ” , 1 896 , p . F . A rchi tec tur e i n th e A n i mal Ki n g do m 1 29 . “ ants u se th ei r larvae as spi n ni ng ” not only for buil ding thei r paper nests bu t w h eel s according to Holland for protecting thei r nest s a l so against th e invasions o f small ants with whom they are i n continual war fare A round the trunk o f the tree containing their nest they sometimes pu t a belt a foot broad formed o f threads which serves to entangl e the small ants and prevent them from climb in g the t ree In manu facturing thi s protective ti ssue the ant s come forth fro m thei r nest each carrying a white pellet i n its mouth and move to and fro on th e trunk Upon closer inspection it was found that thos e l ittl e white lumps w ere again thei r larvae ! These cu riou s phenomena n e eded to b e co rrob o “ rated by further i nvestigation For e l in hi s D i e ” Nester d er A mei sen ( p 2 0 ) al ready called attention to the fact that the mandibular glands o f Oeco phyl l a are strongly developed an d posses s large and numer o u s cells Fro m th e analogy w ith other ant species ’ whi ch secrete ( Cremastog ast er D o l i ch o d er us a certain glu e from th eir m an dibular glands for manu f ac t uri n g thei r paper nest s i t might seem probable th at the Spinnin g material o f Oecoph yl l a p roceeds from the ants mouth But o n th e other hand P ro f esso r Chun ha s recently shown in his spl endi d boo k ” 1 “ From th e D epth s o f the O cean that the spinning glands o f the Oecophyl l a larvae are far more developed than those found in oth e r larvae o f ants We mu st conclude there fore that M r Holland s statements were qu ite exact an d that the spinning glands o f the l arvae not the salivary glands o f the ants themselves tions Th ese . - , , , , , . , , . , , . . . . , , - , , ’ . , , , - . ’ , , . , , 1 ) “ 9 A us d en , Ti e f en de s W e l tm eere s , 2d cd . , J e n a 1 903 , , p . 1 29 . 1 80 III Ch ap ter . deliver the th reads employ e d in the marvelous archi tecture o f Oecophyl l a In adopting this supposition that ants employ “ ” thei r o w n children as a kind o f spinning wheel w e are con front e d by th e extraordinary fact that a n imal s make use o f an instrument oth e r than any bodily o rgan for bui lding an d d e fending thei r nests an occurrence u npar al l el ed i n the whol e ani mal kingdom even among higher animals But can we account for the proceedings o f this I ndian ant o n the score indivi dual o f i n tell i g en ce that i s to say o f her o w n refl ection ? Ju st a s little as in the case o f the other specific arts and talents o f animal s ; for they are all the hereditary property o f certain speci e s not inv e nted A n d there fore o r l e arnt by ind e pend e nt individual s also the spinning t al e nt o f Oecophyl l a e v e n i f it is done by means o f th e larvae i s du e to h ered i tary i nsti n c t not to th e i n d i v i d u a l i n te ll i g e n ce o f t h e animal To obtai n proofs for attributing the arch itecture o f ants to thei r own intelligence we shoul d have to l ook f o r in stances i n which in con sequence o f indi vi dual experience and r e fl ection these ani mal s modi fy th ei r innate instincts i n such a manner as to i nven t Thi s i s n ew m ea ns o f ac co m pl i sh i n g th ei r purp ose the thi rd form o f independent l earning which as we 1 have shown in a fo rmer publication i s a real proo f We must there o f th e intelligence o f the learner fore examine whether the buil ding activity o f ants . , , , , , , . , , , , . , , , , . , , , , . , , , . , , c h pt r d I t lli g c ( H rd r ls b f th is p i t will F hi gk i t d A m is pp 82 1 1 4 1 an ) In th e en n e a e a the on e e o n o e o , e St ae e - en . er e en r L is d i ff e ou . ( ent o f l e ar n i n g i n o o ur Z l gic oo o I s ti c t A m r d t il d d isc ssi Di p b lic t i psyc h isc h S t t t g rt 26 t h iss r f o ms , f ou n d i n ~ . , a, ” u a e o n, u e, e “ a n u e on en e u n a , C h ap ter 1 32 111 . “ A l l the philos following momentou s reflections : 0 p h e rs togeth e r o f anci e nt and mod e rn times and all the theologians mor e ov e r will not impose upon m e by asserti ng that we have to do here with the action I f thi s i s instinct then o f a n u n r e aso n a b l e cre a tu re the invention o f the steam engine i s instinct to o ! N o both m ean a cleve r profiting by gi ven ci rcu mstances ” d ue to r e fl ection ! M any an unwa ry reader may possibly be over wh elmed by thi s spirit e d appeal to th e steam engine o n the part o f M arshall Howeve r i f we do not allow ou rselves to be imposed upon by the boldnes s o f hi s oratorical fl ight w e shal l arrive at di ff e r e nt results wi th out being exactl y philosophers o r theologians W e can obse rve any d ay that o n the pa rt of the ant s ill smellin g o r sticky o b j ect s are simply covered with earth i f they cannot b e removed from the nest Nobody w ill be incline d to maintain seriou sly that “ ants by so doing make u se o f any i ntellige nt gi ft o f ” invention transcending thei r pow e r o f i n stinct O ut si de o f thei r nests al so an d governed by th e same instinct they occasionally adopt the same procedure Now i n the above m e ntioned cas e the ants found that the road wh ich led them to thei r aphides o n the tree had been covered w ith an ill sm elling sticky substanc e W hat was more natural than to fe tch pell ets o f earth and to cl ear a pas sage by a method so familiar to their instinct ? Hence we a re j u stifi e d in drawing the fol “ lowing conclusion : T h at b y th i s pret e n d ed bri dg e ” b ui l d i n g th ese a n ts h ave g i ven i n fa l l i b l e evi d en ce of , , , . - , , , , , - . , , , . , - , . , , , , . , . , , , , - , . , i n ven ti ve g en i us a n d i n tel l i g e n ce i s a sta te ment w or th y o n l y of po p ul ar u n cri ti cal psych o l ogy r efl e c ti o n, , , , . A rc h i te ctur e i n th e A n i ma l K i ng d om 1 33 . One th ing however i s made evi dent b y these and similar observations vi z : that ant s are not mere refl ex machines but beings endowe d with sensitive cognition and appetit e and with the power o f employ ing i n th e most various manner their innate i n sti n c tive faculties and abil iti es under the i nfluence o f di ff erent sense perceptions A n d j ust on thi s account “ i t i s altogether superfluous to admit animal i n t el l i ” gence ; fo r the complex representations o f sensitive cogn ition as we h ave shown in the above example a ff ord a simpler and better explanation o f whatever i s not mere fiction in those supposedly intelligent 1 actions o f a nim a ls A nother example o f bridge building wh ich by th e way i s merely vouched for by a M r T h euerk au f i n “ ” B uech n e r s is G eistesleben d e r Thiere (p stil l less corroborative of ant intelligence than th e former In thi s case the ants u sed a di ff erent mean s for bridging over a ci rcle o f tar smeared around a tree Th e ants were descending from th e top ; o n arriving at the obstacl e som e stuck fast others returned to fetch p l an tl i ce from th e twigs ; they put them o n the tar and thu s constructed a bri dge S i r 2 Joh n Lubbock remark s in explanation o f thi s story that h e had hi s doubts as to the interpretation o f the “ fact Is it not possible that as th e ants descende d the tree carrying the aphi des the latte r natu rally stu ck to the t ar and were there fore l e ft there ? In the sam e way I have seen hundreds o f bits o f earth , , . , , , , - . , , , . - , , . , ’ . . . , . , . , , , , I st i c t d I t lli g c i t h A i m l K i g t h is p i t ) Cf p 1 09 h d 1 37 ff w h r w h v sh w t h t t v d m i m l s m y b cr d i t d wi t h f rm l c sci s ss f p rp s h i gh r d w sps (L d ) ) A ts b s 1 . o on o n ” an 2 “ a n , , n n a ee e an n e an e e a . e “ e a a o e ” e on on . en a on e e n o e n, ou ne o n a a no u n e o e en . C h ap te r III 1 34 . d eposited o n the honey with which I fed my ants I n fact only trivi a l ob serv e rs coul d maintain th at in this cas e the ants had i ntenti o nally employed their a phi des a s bri dge building materials The correct exp lanation might rather b e the following : the ants becoming u neasy about thei r preciou s aphi d e s l iving o n the tree tried to save them by carrying them d o wn “ By thi s attempt h o wever th e aphi des l iterally got ” stuck i n the mu d I t was no doubt m erel y by c h a n ce that the aphi des adhering to the tar fo rmed a sort o f bri dge for the ants These two famous stories are th ere f dre far from furni shing any e vidence in favor o f ant intelligenc e We have to investigate other exampl es to det e rmine ” “ wheth e r o r not ants a re abl e by r e asonable refl ection to invent new means for fulfill ing th ei r d e signs 1 S i r J ohn Lubbock has made a number o f e x p eri m e nt s w ith ant s i n order to test thei r intell igenc e some o f the more i mportant onl y can be m entioned h e re Fo r t h e ant s o f a nest o f L asi us n i g e r he arr a nged a bridge made o f a piec e o f straw o r a slip o f paper by which they coul d get at thei r l arvae A fter the ants ha d b e com e su f fici ently fa m iliar with thi s pa thw a y “ he slightly moved the bri dge so as to leave a chasm j u st so w ide that the ant s coul d not reach a cross They came an d tri ed hard to do so ; but it di d not occu r to them to pu sh the paper bri dge though the di stance third i nch an d they might easily w as only abo ut one — h ave done so A nothe r experiment h e r e lates as “ follows : I suspended som e honey over a nest o f L fl avus at a h e igh t o f about hal f an inch and accessi . , , - . , . , , , . , , , . , , - . . . , . , , , . , , . , . 1 ) “ Ant s b s , ee an d w sps C h p I X a , a . . Ch ap ter III 1 36 . n i g er he fastened a strip o f tin with some honey A fter the ants had for a long time been allowed t o vi sit the h oney the strip was gradually rai sed by a screw u ntil from thei r pathway the ants could no longer get at th e hon ey Though it woul d have be en easy enough to heap up a littl e e arth under the strip o f t in i t never occu rred to the ant s to d o so ; the hon e y remained beyond thei r reach Thi s experiment there fore ha d the very same results as L ubbock s nam e l y that th e ants were not capabl e o f fo rming the simplest intelligent conclusion which woul d have led th e m to employ thei r bu ilding skill f o r the purpose o f gettin g 1 at th e honey I may a d d here a few observations and experiments o f my o w n S inc e it mi ght b e obj ect e d against Lub bock s resul ts that h e took for hi s e xperiments some ” ant speci e s l ittl e endow e d w ith intelligence nam e ly L as i us and M yrmi ca I chose the most intelligent ants 2 n amely F ormi ca sa ng u i n ea and he r allied slaves as subj ect s for e xpe riments o f wh ich only a brie f e xt ract i s h ere presented In th e fron t nest o f my above mentioned obse rva tion ne st ( see p 2 3) a piece o f wood formed a co m m o d i o u s b ri dge over which the ants coul d pass to the ri m o f the glass and thence int o the top nest By their ea rth constructions in the front nest the ants had gradually lowered the bridge s o that th e distance . , , . , . , ’ , , , , . . ’ , - , , , , , , . - - . , - . - - , is xp ri m t th t ts d t v p ss ss s si t iv p rc pt i T h is i f r c is t f r ch i g d c g iti f S s si t iv c g i t i d is wi g t h i m is t k i g i t lli g c d A m is p 73 F h i gk i t D i psyc h isc h S iss p 443) s t t th t F l ( F rm is d ) F r l ls i t lli g c d s rv s t h p l m f g i 1 ) en an “ e th e e e o n i nfe rs f r o u n ea a e e o e th o a s en o e om an on e e 3 sa n B ae e “ e on n n n en e a en e or a n e e u o e no oo e e en or en , e er ou e en n . e an a en e en ar - o n o ea e n , ee on . ” e, e n e. . . . a es a . A rch i tec tur e i n th e A n i mal K i ng d om 1 37 . betwee n the top end o f the bridge and the cork o f the glass wa s about 2 cm When exposed t o the sun the inside o f the glass was generally covere d with moisture and the ants foun d great di ffi cu lty i n passing the i ntermedi at e space and in getting into the to p nest A lthough this state o f a f fairs laste d for wee k s and th e ants co n it n e ver t i n ue d t o encounter the sam e di ffi culties Occurre d to them t o connect th e broad upper end o f the stick with the roo f o f th e front n e st b y a bridge o f e arth They connected th e sides o f the stick with the glas s by a wall of earth ; gradually they also cov e r e d the whole g l ass wall w ith p ellets o f earth to protect themselves against the rays o f the l igh t ; but they n eve r built a bridge at the critical spot where o n e was evi dently needed and o f the greatest importance T h e pellets o f earth acci d e ntally fastened there were on th e contrary continual ly thrown down b y th e ants that crawled up the roa d Thu s exactly that spot over which the ants i f th ey w ere endowed with a n y p ow er of th o ug h t an d refl ec ti o n woul d be expected to build a bridge wa s le ft slippe ry and smooth and was still the sam e after hal f a ye ar In 1 884 I repeatedly made the followin g e xp eri ment : In a tiny vessel I su spended some honey o r ant larvae ov e r a nes t o f F sang ui n ea contain e d in a ” 1 “ large c rysta l l i sat o r s o that the ant s coul d touch th e vessel with thei r antennae only b u t coul d not reach i t exc ept by a very circu itou s route I t should have occu rred to th em t o heap up a l ittl e earth o r some pieces o f wood underneath the vessel in order to form “ ” a bri dge leading di rectly to the wished f o r goal - . , - . , , , - . - , . , , . , , , , . - . , , , . , . 1 ) A lo w , r o un d gl ss b wl c v r a o , o e ed by a gl ss pl a at e . C h ap ter 1 38 111 . But neither the sang ui n eas nor thei r slave s ( F rufa and f usca ) l iving in the same n e st e ver hit upon this obvious method although it woul d have su fficed to raise the surface of their nest at the spot i n question j u st by 1 cm ! A more wonde rful resul t was obtained in anoth e r experi me nt o n the same nest o f sang ui n ea O n June 16 1 88 4 I filled a large watch crystal with water and i n the center upon a kin d o f i sland I placed a l ittle shell filled w ith ant cocoons pr e vi ously taken from the same colony T hi s artificial p ond w ith its i sland was then introdu ced into t h e nest The ants soon noticed the cocoons and stretched out th eir f e el e rs towards the i sland ; but g e tting into the wa t e r at every attempt to approach they retreat e d again and again I began to think they woul d never be able to overcome th e di f ficulty when suddenly a sang ui n ea began to throw into the water pellets o f earth bits o f woo d dead ants and similar sol id materials O thers followed her exampl e and th ey so o n h ad b ui l t a ro a d over th e I n th e space o f am hou r counting from the w a te r ! minute I starte d th e expe riment they h ad fetched al l “ floating t h e cocoons from the i sland by means o f thi s ” bri dge The very last cocoon having been secured by the ants o n e o f the m returned to the island and finding i t empty she squatted on her haunches passed th e spu r o f her fore feet th rough h er mouth and then combed her feelers with the spur sitting there for several minutes in a most provoking attitu de as i f she “ were saying to m e : A h my dear who has won the ”1 ? game now I s thi s fact not a staggering proo f . , , , . . - , , - . . . , , , , . , , . , , , , - , , , , , 1 ) ad d e d T h is v ry l s t i st c m y th rs b y th t h r f r m h i ri gi l t s e e au a o n o an e, s o as an na e o no e . i n th is t r sl t i an a on , w as C h ap ter III 1 40 . th e last twenty years I coul d record here still many an int e resting occurr e nce which like th e above e xam pl e imp resses a superficial observer as an i n telligent action Yet clo se r e xamination invari ably p roves that su ch f a ct s are accounted f o r much more ea sily an d naturally by th e instinctive combinatio n s o f sense “ r e p re sent at ions ; t h e re f o re n o a n t i n t e l l i g e n c e and “ in fact n o a ni ma l i n tel li g en ce at al l is required Ind ee d the high er mamm al s ranking next to man i n brain developm e nt are f ar from supplying m o re con ” “ intelligence than ants In th e m vi n c i n g proo fs o f a l so the whole p roces s o f cogn ition i s confined to the m e re connecting o f s e nse representations an d sens e ex n ctive i n according to the inborn law s o f insti er ces e p which ordinari ly regu a ssoci ation o f representations l ate th e i r l ives The psychi c endowments o f dogs and monkeys go no farther Unl ess a dog ha s been sp e cially t rain e d i t n e ver occurs to hi m to Op e n a doo r the k nob o f which h e i s unable to r ea ch by fetchi ng for instance a foot stool to gain a higher lev e l ; h e may have se e n chi ldren his play fe llows doing th e sam e thing a hundred t im e s ; the relati o n between m eans and e n d though so natu ral and obviou s in thi s case will for e ver remain h i dden to th e canine soul Hence the dog i s not a whit more intel ligent than the ants that fai led to notice that a l ittle heap o f eart h woul d have su f ficed to secure them an easy passage to the honey su spended i n a saucer above their nest Neither do apes possess the power to invent by th ei r o w n reflection new m e ans o f accompl ishing their Even th ese highest mammals are confined ex end , , , , . , ” - , h ” - . , ~ . , . . , , , - - , , , , . , , . ~ . K i ng d o m A r ch i te c tu re i n th e A n i ma l 1 41 . elusively to the instructive association o f sense rep re sen ta ti o n s We have shown this in our first chapt e r where we discusse d the wars that tak e place i n the animal kingdom and pointed to the fact that apes are u nable to invent the simplest weapons and implements ev e n The s a m e hol ds good a s t o the u se o f fire I f a troop o f a p es in th e forest hits upon the remnants o f a fire lighted by the h ands o f man they will cer ta i n l y gather aroun d it and enj oy the com fortable warmth But i t has never hitherto occurred to any 1 a p e to supply it with fuel A n d yet it would be such a simple and natural combination o f representations requi rin g but a low degree o f intelligence Why do “ ap e s in spite o f the high plasticity o f thei r quasi human brain never h it upon such a simpl e m e ans ? - . , , . . , . , , . , . , , B e c a use t h ey p ossess n o spi ri tua l so u l a n d t h er ef or e “ ” i n t el l i g e n c e The pl a sti c n euro zymi c activities . no of the simian b rain are essentially di ff erent from human intelligence ; like those o f ants and all lower animal s they prove to be functions o f me re sensitive instinct I t i s wron g th e re fore to describe ants as instinctive automatons i n order to sa feguard the intell igence o f the highe r animal s The p sychic action s o f all ani mal s are due to automatism as f a r as they are u n able to attain th e l evel of reasonable refl ection and free sel f determination Fo r the rest however there i s no question o f automatis m either with low e r or with higher animal s becau se i t i s sensitive cognition and not mere reflex activity which prompt s them to act It i s true that instinctive actions have a ce rtain auto . , , , . , . , , , . , , Tyl r ( i Ch rl s E v B r ( i h pp 304 g 1 a sc ) Cf e au u n . n o . ae . ” , . , Ran k e n , M sch II K rl E v B r D er S t oe l z l e , “ en a , . . , ae l st un d ed . s i 4 36 ) e ne an d W el t an C h ap ter 1 42 III . matic character inasmuch as they are to a ce rtain degree p redetermined by the natural constitution o f th e animal However inasmuch as they are govern e d by sensitive cogn ition and appetite and there fore c apable o f m o re or l e ss m o di fi ca ti o n with in th e pred e t e rm i n e d natural limits they are not o f an automati c but o f a spontaneou s character In conclusion l et u s sum up the results o f o ur com p arative discu ssion o n architecture in the animal ki n gdom They a re : A nts surpass al l a ni mal s b o th , , , . , , , , , . , , . h i g h er, by th e q uasi i n tel li g en t vari a b i li ty sp o n tan e o us sel f d e termi n a ti on a n d t h e po w er o f l o w er th e a nd - , - sui tab l e ski l l p ta ti o n a da , ma n i f ested i n th ei r as c e rt ai n o N everth el ess i t i s . o t h er a n i p g en ce ma l ro p , f arch i tect ural th e m as a r e n o t e n d ow e d t h a t th ey f o an y wi th i n t ell i erl y so cal l ed . Thi s corroborates the views advance d in our di s 1 c ussi o n o n the d i ff er en t f o r ms of l ear n i ng A nts are abl e to accommodate thei r buil dings to the most vari e d “ ” conditions ; hence they are able to l earn how to modi fy thei r buil dings according to given circum stances But thi s l earning takes place o nly i n so f ar as sense e xp e ri ence gives rise to n e w combinations o f representations ; a s soon however as the mo di fi ca tion o f their activity woul d require i n tel l i g en t r efl ec . . - ‘ , , draw i ng ti o n, o r th e d i t i o n s t o t h e presen t f o co n cl usi o n s fr o m fo rmer co n then both ant s and higher animal s withou t exception are all at once i n capabl e Thi s shows to evid e nce that the of f ur th er l ear n i n g “ ” doctri n e o f animal intelligenc e i s utterly u nt e nabl e , o n es, , . , . 1 ) st i n c t Mo . , “ psyc h isc h I t lli g c i Ch p V III D ie an d en n en e a . e . is Fa e h i gk e i t e n d e r A m e e n ” n do m n th e A n ma ( i l Ki g , pp 82 1 1 4 ; I H r d r S t L is “ - . e e , . ou n , 1 44 Ch a p ter IV . plants The new b ein g comes into e xi stence al ready fully endowed with the power o f subsistence according to the law s o f merely vegetative nature whether it be separated from the mother organi sm o r remain united with it as a new part o f a polyzoal colony H ere th e re fore it would be altogether usel e ss to poss e ss bre e ding insti n cts fo r the propagation o f th e sp e ci es Even among such animal s as propagate through s e xual generation we m eet w ith breeding i nstincts onl y where they are requir e d for the preservation o f th e speci es and the parents care for thei r o ff Spring only i n as far as it i s necessary for th at purpose Withi n these limits however w e fin d a wonderful adaptation o f mean s to the end and at times a mar velons sagacity o f animal i nstinct which app ears nowhere el se to such advantage But al so nowhere else i n th e whol e animal p sy c h o l o gy a re mani fest e d so palpably the i mpotence o f so called animal intelligence an d the unsoundness o f th e m odern t enden cy o f humani zing animal li fe How ” shoul d the ephemera know b y her o w n intelligence that sh e may without any appr e hension drop her eggs into th e water ? D oes she perh aps still remember that ” “ h er mother once upon a tim e dropped h er al so into the water as an egg ? O r has she perhap s by the stu dy o f zoology gained the k nowledge that ephemeras need no hatching ? A ccording to B reh m s p sychology w e ought to give the eph e mera a thorough s colding for showing so l ittle motherly love towards her dear o ff spring and for no t caring for thei r wel fare But scientifically spea k ing such a scol ding i s as n o n sen si c al as i f we were to blame an oak tree for bearing . , - , . , , . , . , , , , . - . , , ’ . , Ca r e o f th e Yo ung i n t h e A n i ma l K i ng d o m . 1 45 aco rns instead o f pumpkins o r a hen for laying eggs instead o f begetting l ive chicks Ephemeras fli t about over stagnant pool s and drop thei r clu sters o f eggs into the water ; pearl fl i es carefully attach thei r eggs to a flimsy peduncle consi stin g o f a sap hardened by exposure to the air ; ichneumon —fl i e s deposit thei r eggs i n the b ody o f a caterpil l a r by means of th e i r ovipositor ; gall fl i es intro duce thei rs under th e rib o f an o ak lea f fro m which later o n the gall nut i s to grow serving both as dwelling and a s provision store o f th e young larva ; the blue bottles place thei r eggs o n putre fying flesh whereas a certain species o f wasps i o m l u i t i P s v a cus ) glue theirs to the bodies o f p ( spi ders which they paralyz e by skil ful thrusts o f their sting without killing them so a s to enable the grow ing l arva e to feed upo n live flesh ; the common cabbage butt e rfly dep osit s h er eggs o n cabbages th e h aw k moth on poisonou s spu rges the large clavicorn water b e etl e ( H yd r oph i l us pi ce us) weaves fo r its eggs an ingeniou s boat with a littl e streame r on top to float about on th e sur fa ce o f the water wh il st a small e r allied speci es ( S per ch eus emarg i n a tus) carries its eggs as many spiders d o in a bag attached to it s abdomen ; the lea f rolling b eetle ( Rhyn chi tes b e tul ae ) cuts a bi rch lea f in a manner implying a di fficu lt probl e m in applied mathematics and roll s it up into the shape o f an ingeniou s funnel in which it d e posits i ts eggs ; whil st Rhyn chi tes pu b escens saws a cradle f o r its eggs in the wood o f an o ak tw i g th e e ar wi g hatch es it s eggs like a hen wh il st L o m ech usa strum osa j u st l ike cuckoos confides its brood to the care Of ants ; they all do their duty with equal pru dence but all to o are , . - - - , , - , , , , , , , - - , , - - , , , , , 10 C h a p te r I V 1 46 . i gnorant o f the p rudence o f their actions and unco n scious o f duty Under th e gu idance o f sensitive cog n i ti o n and perception they fol low the mysterious i n st i n c t i v e i m pul se arising from thei r organi c develop m ent which suggests to them the means necessary for preserving thei r species But th ey do not understand t h e appropriatenes s o f the se mean s and need not reflect 1 how to u se the m to a dvantage Wherever i n the animal kingdom the care o f th e “ young requir e s family li fe i e a regu lar co habita tion o f the parents and o f the young thi s task takes place only as far a s the preservation of th e speci es renders it necessary The same organico i nstinctive laws t o which breeding i s subj ected in general al so determine the existence and fi rmness o f family ties as well a s the extension o f the family circl e with di ff erent speci e s o f animal s There i s no room fo r indivi dual reason and libe rty ; and to postulate them i s not only wholly superfl uou s but al so contra dicted by innu me rabl e facts A s bi rds associ ate in pai rs only durin g the mating season for the preserva t ion o f th e species so in build in g thei r ne st and in hatching their young the two mates c o Operate l ike wis e only as far as i s necessary for preserving their species ; and the pai rs remain together and in com pany with thei r young no longer than the same pu rpose “ requi res A ltum in h i s excellent bo o k D er V ogel ” und sein Lebe n h a s suppl ied u s w ith a number of striking instances proving how ridi culou s and unten , . , . . - . , . , , . , , . , . , - , . , , , ly pr v d th is f ct i th c s f i s c t s th t t rwiss liv si gl i b k D Trich t rwic k l r i sc h f t lic h S tu d i b r d T h i i t i t ( C h p I V ff ) t h t t h r is d f r pr f h r ti g h 1 ) We ha n e e n ee n e, e o v e so o ur ue e e p ea m n i n ut e oo “ , e oo e e e e . nc ” a e a e o e ne na u . , n a e er er n s en t o . , a n e a en e e a no C h a p te r I V 1 48 . they h ad never belonged together Thi s is a g en enal l aw of na t ure ascertained by science th r o ug h o ut th e setting at naught all the fine w h ol e a n i mal ki ng d o m phrases and sentimental talk o f Brehm o n marital and par e ntal love amon g animals A n d th is gu sh the outcome o f erroneou s not ions and m i spl a ced sentime n t i s dubbed by thousands o f its vota ries mo d ern a ni mal . , , . , psych o l ogy ! of the young in its most primitive for m i s found among th e E ch i n o d erms namely in a few spe cies o f sta r fi sh e s ( A steri as M u el l eri r ug i spi n a Cri ‘ 1 A ccording to P e rrier th e femal e ani b rel l a o c ul a ta ) ma l by bringi ng her arms near to the body forms a kin d o f breeding cavity in wh ich th e young hu d d l i n g together are enclosed I n the di ff erent classes b e tween the E ch i n o d erms and th e vertebrates car e o f the young assumes ve ry di ff erent forms which We a re unabl e to di scu ss here O f pecul iar p sychological inter e st however are those animal s am o ng wh o m the m al es and n o t the f e mal es are entru sted with the car e o f bui lding nests an d rearin g the young The be st know n exampl e o f thi s kind among fishes is th e 2 stickle back ( Gastero steus a cul eatus ) In thi s speci e s “ ” the fem al es are regular ca nnibal stepmoth e rs “ wherea s the males are m od el s o f a ff ectionate fath ers H ow ri diculou s such facts are wh en couched Care , - , , . , , , , . , , . , , , . - . , . , 1 ) S ee N at u r k ( . . . 2 ta i n e vo n “ ) e 9 e an d p , u dwi g , 1 89 6 , l . 21 7 on a r ee . en , . on n 534 , o B ru N OS . S i t zun g sb e r st o h al f , p . . d er N i e de rr h b si d s 1 04 ; e e in “ . Ge se l l sc h Z oo l o g . An e . , 10 ) n e No . 535 , a a ” e an d ne “ n s ue , e en r an e re n a er . . . e a e o er f ue e e r " , . . a e . z ig r p 237 m g m ph i b i s c s s f m l h t c h i g h v b ) A ls d F V h dl Z l g b t S W r r i d G 1 898 l t iss p 1 1 ff S ls R Wi d Wi h i i d r W i b l th i tp fl g ( B i l g C t l b l XX No . B H L n oo o ee o o a . o a - . e en e o an e . e n ra , . asc e r e se l l sc h e r sh e i m , . . 1 900 , Care o Y o u ng f th e i n th e A ni ma l K i ng do m . anthrop omorphi c language goe s w ithout sayin g S ome instances o f taking care o f the young occu r also amon g amphibias The f e mal e o f the S urinam toa d ( P i pa d orsi g era ) carrie s her young in the cavities o f her dorsal skin ; whereas in a frog spe ci es ( A rth ro l ep ti s seych ell en si s ) inhabiting C entral A merica the 2 young hold o n to the back o f the m ale But quite universal and commonly known i s the care bestowed by bi rds an d m amm als upon thei r young Yet its highest per fection connected with the most per fect form o f community li fe i n the animal kingdom does not occu r w ith the higher ma mmals bu t w ith the Here thi s degree so ci al i nsec ts i n particular with a n ts o f pe r fection i s made possibl e by the organic division o f th e female sex into females proper an d i nto nurses ( wo rkers ) incapabl e o f generation A n d although these are not th e mothers o f the children they nurse the psychi c d evel opmen t o f thei r b reeding instinct reaches th e greatest perfection in the whol e animal kingdom Be fore discussing however this asp e ct o f the breeding instinct o f ants we mu st first explai n it s connecti on wi th th e laws o f their organic develop ment The bodily diff erentiation o f th e members o f an insect state int o clas ses and castes thei r co— habitation i n a common abode thei r nest c o nstruction acqui sition in 1 . , . . . , , , . , . , . , , , . - , - , , ll wi g msi g q t t i will d f th p rp s T h g r t s t d g r th r t s h i m ( Mr S t ic k l b c k ) f r m t h m t h rs f hi w ch il dr E g r t d v r th ir w ff spri g t h y l l y d sh i g i ti is g i st t h s t i wh ic h t h y g g r d d b y t h ir w tc h f l f t h r d b t t f t th l tt r p ys t h p l t y f h i p ly g m y ( T h il U mb il d g d G li d m ss d Fisch i B i l g 1 89 7 l t iss p X II 89 ff ) Z l g J h b Ab t h f r S ys t m t i k 1 ) T he f o an ea e s o en. n ua ua a n e o e, 2 a " “ s n “ oo o o o . a e ou o on a a n a e ” a o o, . , e e . e a o n . ue ne u an “ e o n oo o a u e o e : o e n e , e en e n an ue , s or o , un , r o ’ u a on . e un n e en a uo a n e a en e n u a n o e en a e e e ar e c on o un ar e a e e a en . ” , o . ' er 1 50 IV Ch a p te r of . food thei r whole li fe and activity have for their obj ect th e care o f the off spring and thereby the pres e rvat i o n o f the species The animal colonies o f bum 1 ble bee s w asps and hornet s repr e sent a lower st a ge of community li fe th an the perennial colonies of h oney bees ant s and termi tes I n the case o f the former t he insect famil ies and the e n tire community l i fe have to be establi shed anew every year by some hibernating female ; but w ith the l att e r t h e original f a mili es l ast several ye ars and o ften much l onge r thus giving thei r community l i fe a character o f stability and al so o f great e r vari ety and perfe ction Th e organi c foundation o f i nsect states a s already shown above ( p i s p o l ym orph i sm o r the s e p a ra “ tion o f the individual s int o sexual animal s and n e u 2 ters o r work e rs T he prim e duty o f the fo rmer i s generation th i s being the direct means for preserving the sp e cies wh il st the l att e r perform all th e wo rk requi r e d for the wel fa re o f the family thu s in their turn indirectl y contributing to th e sam e end Without thi s appropriate divi sion o f labor insect stat e s woul d be impossibl e ; and as a rul e the more per fect thi s divi sion the more pe rfectl y developed i s the i nsect 3 community I n be es with whom the workers are V ol X I X 1 896 ) A cc r di g t H v I h i g ( Z l g A , , . - , - , - . , - ' , - . - , . , ” . , , , . - , , , . 1 n o p , o . . oo o nz . . , . , b r f t h Br zili s ci l V p i d i l c l i es f s v r l y rs t ) f rm p r Ch t g t iv l s w sps t lr d y i C h p I N 2 r f rr d t t h f c t th t i ) W h v r li t y t h y k i g s xl ss t pr p rly sp th tt c h d i t h is pl c t ) T h gr t s t i m p r t c m s t b b t w s x l i d ivi d ls d w rk rs T h s g i d if r ti ti th l c l i s f b mb l b s th r is di m rp h ism f w rk rs m r i c pr il d h m r k d d ivisi f l b r th th E H fi c i s f h yb ( O th b m bl b s p xc ll t b s rv t i s th b m bl b N v r th l ss t h f S t yri ) st t s m r p r f ct th cc t b f t h b mbl b s th s g r t r d i ff r c b t w th ir w r k rs d g i f m l s th 516 No ( P o l y b i a, , . 2 ea 8 an ol e en on e e ee e en - en o on e e o ea e o our o a e a e e ar e a on e a o on e e en on e e e e - o , n e e e n e u e e es a or e e a ae ea , n a , e e - se e ee a u u . es e - ee en u n e . e on e e e a a e o un . e , en n a o . n . . o e e o e e n . e e o an o an a o o e e a n a a o o e o e ee - a a u e o e . an o o e e e e , e ee an ee n . , on . o an o on , . ua e ee - en n a n e a e u e ua u o . ea e e a a an o e e n e en e o o e n um na o , e . ea a e on a e c ea e e an n u a e a ar e n o e e u s, as o ur on e e a a a r er a n n ua no 4 49 ) . l rg “ er n ’ ’ er s e of C h a p te r I V 1 52 . mammy that a young rooster becam e a rooster and not a j ackdaw so no intelligence of t h e a n t i s respon sible for th e fact t h at from the eg g and th e l a rva which she nurses there emerges not a bee but an ant A l l thi s i s sel f evi dent Yet th e p e culiar organic law s o f dev e lopment not only form the ma teri al o f the breeding instincts but al so th e i r d i re c ti n g The breeding instincts of the di ff erent pri n ci pl e sp e cies are so well adapted to th e hidden laws o f organic growth that no reflection or i nt e lligence o n the p a rt o f the animal nay not even the ke e n e st hum an reason coul d ever succeed in inventing them M ore over they are exerci sed by the work e rs completely and p e r fectly without previou s e xperi e nce or instruction ; they are innate in the animal and grow with it and w h e n the young ant h a s r e ached the p erfection o f it s orga nic development they likewi se are j u st as perfectly developed Hence they must spring from the same source as th e organic growth that i s to say th e y spring fro m the o rga ni co psy ch i c l aw s of d evel and have nothing to do o p m en t o f a gi ven species with indivi dual reason and free dete rmination As it i s by organi c development that the male o f an ant —species receives also the p sychic endowment o f a male thus i t i s with the females and the workers T h e di stribution o f psychi c endowments i n the di ffer e nt caste s o f an ant — state i s regulated by the same laws a s thei r bodily polymorphi sm A n d thi s alone accounts fo r the fact that with in one and the sa me species the males are the most stupi d me mbers o f the whol e state possessing th e smallest b rains whil st the workers a re endowed with many marvelou s instinctive talents and , , , , - . . , , , , , . , , , , , , , . , , - , . , . , . , , , Care o Yo ung f th e i n th e A n i ma l K i ng d o m . ven su rp a s s the female s proper i n per fect ion o f 1 instincts and b r ai n d eve l Op m e n t Those females which are destined for gen e ration are provided b v their organic development with perfect ovaries whilst thei r brain an d instincts are far les s perfect The work e rs o n th e other hand which o n account o f their small ovaries may b e called undevelop e d females are compensated by a more p er fe ct devel opment o f the brain and the instinctive endowments H ence the astonishing p ru dence displayed by the work e r ants and thei r con sequent social leadership are merely a f un cti o n o f th ei r org ani c d evel opmen t Thi s i s the ” “ ” “ intelligence and intellectual li fe o f ants so c al led viewed in the light o f genuine scienc e ! We have thu s far b ee n considering the breeding instinct s o f ants from th e i r o rg an i c si de ; let u s i n t h e subsequent discus sion turn o ur attention to their psych i c aspect e . , , , . , , , , . ' . - , , , . t h e Y o ung a m on g A nts f The h ereditary disposition o f the sensitive co gn i tion and ap petite o f animals called i nsti n ct has in the cas e o f ants a wi d e range an d gr e at variet y o f actions an d especially so with regard to the breeding instincts wherein ant s su rpass even the h ighest mammal s T h e instinct ive di sposition i s no mechanical automati sm 2 Care . o . , , , , . , p d cl s f t h si g ific c f wh ic h t br i th wi th r g r d t psyc h ic li f w h v lr d y p i t d t i f rm r ss y F r l s ys L c rps p é d c l s s t r m s c h z l vri er s g r F r mi c q i r f r m l f r m is l pl s i t lli g t s ; t d c h s t é r em rq b l ils s t pl s p t i t s ch z l f m ll s t b c p pl s p t i t s ch z l mél d m em g r ( F r mis d l S iss p M y w b s rv t i s c fi rm F r l s s t t m t s ; I s t i c t d I t lli g c i t h A i m l K i g d m p 1 30 ff 1 e a e u a o , en o t o th e ) As r “ n e, n a e o s e au o u u un e o e e e : a, a u en u ua e n e en e es n n o a ou u e a n eno on on a e es e u es e ou o n e ea an e n e n ' es on e, o . e e e u e on o e ” an es a e e a n, an e o e en on n o o u n e e es e e ’ . o e e en e e e ou a e ” , a es ou e “ o . e e e e en , a se e Ch ap ter I V 1 54 . but i s g u ided and influenced by variou s sensitive a ff ections an d perceptions In bee hives the eggs are simply deposit e d by the que e ns i n the cell s previou sly pr epar e d b y th e worke rs and the young bee larva goes through the successive stages o f developm ent i n o n e and the same cell With ants br e edi ng shows far greater variety and i ndependence The eggs lai d by the queen are received by the wo rkers and gathered in clusters o f va riou s dimension s Then from all sides they are l icked a gai n and again w ith the utmost care and begin to incre a se by the endosmosis o f th e nour 1 i sh i n g j uice Thi s i s th e first stage in the reari ng of the young in ant communities A s soon a s the e gg h a s d e veloped into a larva there follows the second t h e fe e ding and nu rsing o f the larvae When the time for e ntering t h e state o f a pupa has arrived the ant larvae are carri e d by th e i r nu rs e s to a spot cov e red with damp earth whereupon e ach larva i s surround e d by a ca se o r little dome o f e arth within whi ch it spi ns its cocoon enwrapping the whole body From ti m e to time some worker comes to see wheth e r the cocoon i s finished A s soon as i t i s i t i s care fully cleansed o f adhering earth and i s then stored up i n a neat little heap in company w ith oth ers that have reached th e same maturity With tho se ant species whose larvae do n o t spi n cocoons the larvae are not encas e d i n earth be fore thei r pupation O n th at account the e x t rem e l y tender ski n o f the pupa unprote cted by a cocoon requi res all t h e mo re care and caution lest grains o f sand or moul d shoul d enter between th e - . - , . . . , . - . , , . , , , . , . , , - . , , . ' , 1 p o . f g r w t h f t gg s F r l F r m is d l S iss r i m p r t c wh t h r i cr s i v l m i t is f m i t th gg s b c ll d g r w t h i t h pr p r s s f th t r m ) On 388 ; an t e - th e o no o e o a e an o o - e an n o se e e, e e e o e e ou , or no en e e o n e ea e e u a e . n e, o u e Ch ap te I V 156 r . cl ean the larvae entru sted to them Therefore we are right i n exp e cting that the same perfection o f the breeding instinct s of ant s will be mani fested al so in the other branches which are not l ess im p ortant for the preservation o f the speci es namel y in the su itabl e re g ulation o f the temperature and in th e p roper nour i sh m en t and de fense o f the brood In the care o f the young it i s o f th e utmost impo rt ance t o regulate the conditions of temperature in a manner mo st advan tageou s t o this development In bee h ives th e position o f the brood i s d e termin e d b y the shape o f the comb Throughout its developm ent th e young bee remai ns in the same cell in which it wa s placed a s egg and i t i s therefore constantly sub j e ct to the same conditions o f temperature It i s quite diff e r e nt with ants H ere the temperature has to be altered an d regu l ated by the workers according to the di ff erent stages o f development The eggs an d th e la rv a e in thei r earl iest stage are generally stored up i n the lowest chambers o f the nest where the air i s cool and damp Further above the hal f grown larv ae are lodged whilst th e uppermost stories are occupi e d by th e full grown larvae and the pupae ; for these l atte r requi re f o r th eir development great e r heat which i s foun d i mmediately beneath the su rface o f the nest st ruck by th e rays o f the sun I f o ut o f doors it grows chilly and rainy th e pupae and el der larvae are immediately carried into th e lower chambers where they are b ett er protected from col d and moi sture Thi s regulation o f the conditions o f temperature alone according to the necessiti e s o f di ff e rent stages o f dev e lopment implies astoni shing sa gacity such as even . , , , . . - . , , . . . , - . , - , . , , . , , , Ca re o f th e Y o un g K i ng d o m i n th e A n i m a l 1 57 . men woul d be abl e to acqui re only after year s o f ob servation an d study Yet i n ants every single wo rker i s endowed with it as soon as she i s drawn from her coc oo n and has become d rv Th i s i s because thei r s a gacity i s i nsti n cti ve essentially di ff erent from int e l A nts are i n thei r every action l i g e n ce an d reflection guided directly by sensitive perceptions n o t by int e l lectual ideas The e ni gma there fore i s satis fact o rily e xplained by the innate adaptation o f thei r sensitive cognition an d appetite whereas the hypoth e sis o f ani mal intelligence i s unable to o ff er any solution But n o w we com e to the most pu zzling an d mys t e ri o us qu estion i n the nursing o f ants namely the , . . , . , . , , , . , i n fl u e n ce o f d evel o p me n t th e e d uca ti o n o f , th e yo u ng l arva e on th e S cienc e f has but j ust now begun to divine the mysteri es hi dd e n h e re ; bu t it i s still far fro m having fatho m ed th e ir d epths We shall very briefly place be fore ou r readers what i s certain o r at l east probable concerning thi s matt e r It will ful ly su ffice to prove that the nu rsing instincts o f ants bees an d t e rmites are fa r superior to th ose o f birds and mamm al s A ccording t o the ol der Opinion thu s far commonl y hel d an d based chi e fly o n D z i e rz o n s classical ob se r va t i o n s o n be es the sex o f their posterity i s determined by the i nstinctive choice o f the oviparou s que e n and not by the workers that rear the b rood Be cause it h as be e n observed that w ith ant s bees and w asps un fe rtilized eggs produce males only it i s assumed th at al so th e normal males o f these social insects are al ways h atched from un fertili zed eggs The qu ee n when depositing h er eggs i s suppo sed by either open d i ff er en t o in c as tes a n t sta tes - . . . , , . , ’ , , , . , , , . , , , C h ap te r I V 1 58 ing or closing the connecti o n between the ovi duct and the semi nal vessel to control under the influ ence of h e r oviparous insti nct the f e rtilization o f the egg and there fore to deci de whether it woul d develop into a m a le o r a female Th i s instinct o f the queen i s arou sed to suitabl e activity by the peculiar nature o f the cel l i nto w hich she puts h e r head be fore ovipositi on ; i n d ron e —cel ls sh e put s an un fe rt ilized e g g i n those o f a future queen o r worker a fertiliz ed o n e P robabl y she i s l e d to m ak e thi s diffe r e nce not so much by the touch perception o f the di ff erent shapes o f the cell s but ra ther by the smell o f th e s alivary gl a nd secretions 1 e mployed by the workers i n th e i r constru ction Th e peculiar odor o f th e cell s however as wel l as th e i r si ze an d form i s due to the architecture o f the workers ; thu s i n b ees the sex o f th e o ff spring i s i n d i r e ctly at least controlled by the instincts o f the workers With ants i t i s different becau se thei r queens do not d e posit the eggs i n cell s but simply su ff e r th em to be received and carri ed away by the workers The instinctive sel f determination o f th e oviparou s femal e seem s therefore to be greate r w ith ants O f cou rse it i s very probable that the nouri shment an d treat ment o f th e qu een o n t h e part o f the workers indi rectly al so influences the oviposition ; but in what manner i s a s yet entirely unknown To pass from the queen to the workers i t was asce r f ain e d long ago that with social wasp s bees and ants al so workers which have small ovaries with a reduced numb e r o f ovarial tubes and are besi des unabl e t o , , , , , . , , . - , . , , , . , , . - , . , , , , . , , , , , , 1 ) Cf l g g p bl w a un e o , . on . . th 32 ; is p i d p an o nt . N 57 . of L i F tt rs f t d r t h i i p b lic t i f F rd D i c k l ud w g , the , , , u u a e on a o o e e r sch e e . e V r ment e an i on e d Ch ap te r I V 1 60 . males Th i s phenomenon mani fests the marvelous sagacity and quasi intell igent plasticity of animal “ ” instinct which can h ardly be styled automati sm N either ca n i t b e id e ntified w ith i ntelligence properly so cal led for this woul d suppose rational knowledg e o f the inte rnal l a ws governing the growth of the ant o rgani sm a knowl e dge f ar surpassing even the i n tell i gence o f man an d entirely beyond the reflections and experi e nce o f ants Only the ap propriate dispo sition o f thei r sensitive cognition and ap p e tite can account for the fact that the perception o f a given want is followe d by a co rresponding modification in thei r nursing instinct by which the defect i n q uestion i s remedied A ccording to D z i e rz o n s vi ews wh ich we men t i o n ed above it i s th e oviparous instinct of the qu e ens that control s the sex o f the be e developed from a given egg ; in thi s suppo sition the worker be e s a re assigned a mer e l y indirect influence O f late how ev e r an o th er theory o n the di ff erentia tion o f caste s i n bees has been advanc e d which assign s to the nurs ing instinct s o f th e wo rkers a far more extensive sphere o f action The ori gi nator was an Italian p riest Lan franch i by name who publi sh e d it in 1 894 in the “ I n G e rm any i t was develop e d an d A picoltore confirmed by ne w experiments princi pa lly by Ferd “ 2 D ickel the editor o f the N o e rd l i n ge r Bi enenzeitung pub l i s h d s m b s rv ti s ) M r r c t ly H R i c h b c h h l . - , . - , , ‘ . , , . ’ , , , - . , , , . , , ‘ . . , . , 1 o en e e en e . a e as Bi l C t l b l 1 892 p 46 1 if ) wh ic h s m t L i p rt h g t ic gg s l i d b y w rk rs i g r th l t w r k rs B t f rt h r c fi rm t i will b cc p t i g th is s t t m t I N r th A m ric P r f W l t ly p b lish d s m i t r st i g r p r t s p r t h g D P ri cip d G h l h t b i l d g b i T h i ) f Gr dl g m i r Bi F tpfl t wic k l t g N 1 898 ; f sp ci lly p 20 dl i g “ ( in o as us a so a n en ra . e o o u a e 2 or oer “ e as a n z un n u . en , o n , er en n e sc au e c . e e a o a e on o un s ec un . a . e e e on e o n e a on e . n e e e en e u en a e n e en o o ee . . , , a e e . o a o a e e ne . . eno e o o e, pr v t h t wi t h m y gi v ri g i r q ir d b f r M Wh l r h ts si s i g sc h l ch t lich r f rsc h g a a e u e n e e an as . e e o e o ee e n en e n o e . ene e re n on a e un en ” . Care o Y o ung f th e K i ngdo m i n t h e A n i ma l 161 . D ic k el says : Under no rmal circumstances the fer t i l i z e d mother b ee lays only fert ilized eggs ; it is the workers that influence and control the f a te o f th e se ” homogeneou s eggs A ccording to thi s new opinion also those eggs which i n normal bee hives produce d ro nes are f e rt il ized ; and not only the di ff e rentiati o n between queen and worker b u t between queen and d rone and between w orker and drone i s due to the influence o f the sal ivary gland secretions o f the workers on the eggs previously deposited in the cell s H ence D ickel regard s both qu eens an d drones only as the f o u n da ti o n for the development o f th e sexes the workers however as the really d etermi ni ng factors A ccording to D ickel certain salivary glands o f the workers contain the secretion s determining the sex a n d th e di ff erentiation o f all the castes i n bee hives d e pends on the instinctive appl i c ation o f these secre tions when the wor kers are l icking the eggs A lth o ugh several biol o gi cal ex p eriments o f other authors seeme d to co nfirm the theory that under nor 1 mal conditions all the eggs in a bee hive are fertiliz e d we must add nevertheless that the very exact micro sc0 p i cal stu dies o f P a ulk e and P e t run k e w i t sc h on the existence o r non existence o f spermatozoids in th e eggs o f bees rath e r corroborat e the o l d theory o f D z i erzo n according to which the eggs giving origi n to drones develop w ithout containing any spermato - , . , - , , , , , . , , , , . , , - . , - , , , ’ - ’ , 1 Cf N ) . . L u d wi g N , s b rE h H i gb i d e ue Fo rt p fl an z u n g sve rh a e l t n i sse X LI V ue e on er e e 1 898 , 1 2 th “ - en e ” e a u 11 e . un e e “ ue , e un e n en e n en er e ue a un e “ ” e e e n a u , br er e ue e e on un z u r n e ue n . , e e ue ue , br pp e . Fo r t p fl an z u n g sv e r h a e l t n i sse d e r e ” , r un g s u n d e ne iss pp 7 05 g d Bi d i G sc h l c h t s b s t i mm b r di W i t r Er g b iss 1 40 1 48 ; Bi N t r d O ff b r g 1 90 1 , i sb s d d ( N t r W it r s L hr ( i b i d X L V 1 89 9 3d iss r n ae , 7 th iss u e, pp . 42 6 Ch ap te r I V 162 . It i s best there fore t o su spend o ur j ud gment on thi s p roblem until it i s definitely solved I f the new theory o f the fe rtil ization o f al l the eggs i n a bee hive under normal conditions should prove true i t ought to be extended al so to the ants H e nce i n ant colonies t oo it would be the workers who by thei r nursing i nstincts determ ine whether a given ant egg i s to p roduce a worker a winged female a soldier o r a male We int end here however to consider only th e wonderful i nfluence exerci sed by nursing on the di f f e re n t i ati o n between females an d workers Thi s i s an e stabl ish e d fact quite independent o f the new theory Why i s i t that o n e and th e same kin d o f egg now produces a queen w ith complete power o f generation no w a worker devoi d of generating powers but co m p en sate d as it were for thi s loss by psychi c endow ments all the more per fect ? H ere w e ente r a mys t e ri o us re g ion where the breeding instincts o f social in sect s rei gn suprem e an i nstinct which for its creativ e pow er i s unparalleled in the entire animal kingdom It i s a well known fact tha t with hone y bees a worker larva can be devel oped into a queen by i n creas zo i ds 1 . , , . , - , , . , , - , , , , , , , . , , . . , , , , , , , . - - , 1 P ) W . isc h r An D i e Ri ch t un gsk ii rp e r un d P a ul k e e t r u n ke wi tsc h , “ in A n at o m e z ig r e e V ol , . S ch ic k s l i hr XV I , im e a 1 899 ; A . b f r cht t r A h ti f u e en Z l Jhb h A g A t mi V l XIV W i m U b r d i P th g s d Bi ( A t m A z i g r V l XV II I 1 90 1 N H B tt l R p U b r di D i h T h ri ( Bi wi t h f tl 1 90 1 N Fr i b r g r C t l bl D A b sc h l ss d Ei t u h 1 90 1 Di P rt h g sis b i N ( Ib i d g d H i gb i N t r d S ch ul V LI 1 902 4th i ssu ) ; P B h m ti w Ei V rs c h di Fr g b r d i P rt h g s d l Dr h f 1 903 N 2 ( A l l g m Z it h un d un na o . . o e . - un en e on e n en zu “ , ” ” ee “ na o “ en en . e o , a u n ” e “ e e . z e rz o n sc “ e o a sc r. ue e e . , e . “ ” u en e en o en o a , en e os . e e e , e en en e er a en o ar os , eo ue . e u . ” e e e “ o er, , ’ e, e “ a n n, o ue c r er e . , . , , ” a . e s un u oo e ” . “ . n e e , ” ce sen ( u , e n ra . e B i e n en e i , et e n e n en u un e rs c ac o er r sc er u e c, en e e v b f r cht , . e er Ch ap te r I V 1 64 . i s no possibility of developing into certain fo rm s there i s o f course no basis no material for the exercis e o f the nursin g instincts o f th e workers From thi s it becom e s clear why fix ed intermediate form s betwe e n fe mal es and workers occur with certain sp ecies di f f e re n t fo rm s with oth e r species whilst with others a g a in there are non e at all But within the l imits o f thi s natural disposition f o r further devel o pment there r e mains t o the ant s a w ide range f o r exercisin g their nursing i nstincts These int ermediate form s between females and w ork e r ant s I h ave grouped into six clas ses but h e r e we are concern e d with but o n e or two o f them In “ ” som e o f these eirg a togyn e f o rms it appears almost a t a glance how they came into exist e nce namely whether the larva rear e d up to a certa in stage to be a worker was later on cared f o r so as to become a female o r whether th e Opposite took place In th e first case th e intermediate form m akes the impression that the worker charact e r ha d been developed to excess ; i n the second ca se th at the female character had be en stunted ; in the forme r th e so called worker like ( e rgatoi d ) queen s are th e result i n the latter a kind o f female —like workers which I have named pseu do females ( p seudo gyn es) Th e former combin e the vaulted thorax o f females with the small and abdominal development o f queens ; the latt er unite the vaulted thorax o f females with the smal l and stunted abdomens o f workers Especially the latter form the pseud ogyn es are apparently best account e d for on the score o f education rathe r than by a peculiar disposition inherent in the egg from wh ich they are , , , , . , , , . , , . , . , , , , , . , , - , - , , - . . , , , Ca re o Y o u ng f th e i n t h e A ni ma l K i ng d o m . I know some colonies o f F ormi ca san g ui n ea near E x at e n in which these p se u do gyn e s su d d en l y made thei r appearance bec ame more numerou s in the course o f the next few years and gradually decr eased later o n or di sapp e are d enti rel y O ne co lo ny ( No 2 1 ) i n 1 895 reared eve ry po ssible p seu d o gyn e intermediate form between normal workers and normal qu e ens ! S ince the queens which lay the eggs in these nests are unable to change at will the n atu re of th eir ovaries fro m year to yea r but are always compelled to lay fertilized eggs capab l e of e q u al d eve l o p me nt the origi n o f those i nterm e diate forms i s probably due to changes in the m an n er of and to modifications in the very nu rsing n ursi ng i n sti n cts o f th e workers Thi s supposition is con fi rm e d by the fact th at i n F san g ui n ea th er e i s a hatched 1 . , , , , . , . , , , , . . , ce rtai n re l a ti o n ca usal e d u ca ti o n o th e an d d og yn es o ri g i n b e tw e en th e f l arvae th e g u est, t h e b ee tl e L o m ech usa o f pseu o f a i e n u ne g m osa I have ascertained thi s mysteriou s conn e ction by means o f my stat isti cs embr a cing 4 1 0 san g u i n ea col onie s w ithin a radiu s o f several kilometers aro und E xate n ; these stati stics will be publi shed later o n i n some scientific 2 p e riodi cal Here it may su f fice to mention that the centres o f propagation o f the pseu dogyne forms and o f the L o m ec h usas are al ways together i n the same an t - str u . . , r c t p b lic t i N B t ti gu g d L m h T h ri ( V h dl d D t sc h 2 1 P d gy 1 90 pp 98 1 0 8 d P 1 I I ) w h r t h is th ry is x t d d ls t N r t h A m ric ts b l w ( th f ll wi g s c t i p 1 79 f ll d th S pl t pp si t p b gi i g f th s st t ist ics d t s b c k t 1 89 5 D i ) Th d ih r F r m b i d A m is E kl Bi l g t gy g 1 ) S e e my se u n en o a e o 2 er an an a o o e n en u en eo an - . e e “ e . on , er an e e ue e s ae eu er . e eo e e o ee . e , a o o n n . 00 e en e on, en er ec o usa " . e a o o . o o an . e . nn n e o o en e 1 895 , N os . 16 a o e en an d e a e en un a e o r ae r u n e ” , “ o . Ch ap ter IV 166 . or at least in neighbo ring nests The number o f colonies i n whi ch I found L o m ech usas i s mor e than three times as great as th at o f nests containing th se are the centers from which s e e u d o n es p gy ( 33) the L o mech usas gra dually spread to the nei ghboring nests where by and by they cau se the bi rth o f p seu d o gyn e s It i s scarc e ly possible that the presence o f thes e beetles an d o f th ei r larvae which are fed by the workers shoul d have a modi fying influence on the ovaries o f the q u eens but probably they do so o n the nu rsin g instincts o f the w orkers My re cent observations and experiments until 1 90 4 have con firmed thi s solution o f the interesting p roblem S ome o f the above m e ntioned intermediate ant form s are u se ful for the pr e servation o f the colony an d th e species whil st others are mor e or less i n d i f f eren t and still others positively h urt ful being p rob ably pathologi cal deform iti e s The r e a ring o f worker l ike W ingless queens among the A mazon ant s ( P o l yer u e n s for instance i s very approp ri ate s r u e s c f ) g b e cau se thei r colonies are rathe r ra re and far di stant from o n e another T here fore the probab il ity i s very slight that o n thei r nupt ial fl ight the winged sexes w ill m eet w ith those o f other col oni es ; an d besides thi s specie s h as t o encount er exceptional diff i culties in founding new settlements by means o f singl e fertili zed fe mal es since the A mazons are enti rely depen dent o n the help o f their slaves T h e wingles s queens o n the other hand cannot go far from thei r nests ; and a fter th e y have been impr e gnated by the w inged mal es some strolling slaves can easi ly find them in the neighborhood and brin g them home a g a in ; hence it . , , , , . , , , , , . . , , , . , , , , . , , , , . , , , Ch ap ter I V 1 68 i f they had but a Spark o f intel ligence sa d experi ence s woul d have enlightened them long ago on the fol ly of this mistake Nay more i f the p seudo g yn e s ow e d th e ir origin to the n o rmal nursing instincts o f ants w e shoul d have to d esp a i r o f the fitnes s o f anim a l i nstinct and even o f the wi sd o m o f the Creator What i s the key to thi s myst e ry ? It i s the b e etle L om ech usa str u m o sa A ccording to ou r h ypothesi s the rearing o f the p seud o gyn e s i s an ab errati o n o f the breeding instinct o f ants cau sed by the continuou s educati o n of L o m ec h usa larvae I n th e econo m y o f nature it i s the duty o f thi s beetle to check the excessiv e increase o f the ant —sp e ci es whose hospi tal ity i t enj oys Fo r thi s reason its larvae not onl y consume co untles s ant eggs and ant larvae — the ants cal ml y looking o n th e whil e — bu t by destroying the o ff spri n g o f th e ants and by th e care which the ants bestow o n th e m they ca u se th e d eg en er ati o n of th e n o rmal n ursi ng i n sti n c ts of th e w orkers resultin g in the education o f 1 crippled p seu do gyn e s To account for these facts on “ the score o f indivi dual animal intell igence woul d , . , , . . , " - . , . , ‘ - - , , , , , . Th s xp si t i s will pr b b ly s ff ic ls t r f t bj c t i m is r is d b y D G A dl wh d rs t d i g m y psyc h l g ic l pl t i r ri g f p d gy s ys i t h th ir d p r t f h i f th v l b l M y m l g i k t di r ( S t c kh l m p 5 1 W i th r g r d t t h is W sm s ms i cli d t cr d i t t s wi th g g r t d p w r f r fl c t i w h ic h h t h rwis is willi g t d f th B si d s t h p th l gic l d g r t i b r di g i s t i c t xpl i s r ri g f p d gy is s till c t i d v wh c l i s wh y t h h v b f th ir L m h By th w y l t m r p t d priv d r m rk f rm rly m d t h t th c l c c ti f p d g y wi th ti f t h is is t t b c f d d wi t h t h L m h th pl c cti fi rmly s t b lis h d b y d ir c t b s rv T h f rm r s m s t b h yp t h sis b t h yp t h sis s t r l t t r is s t ill gly ti th fi rm d b y r c t xp ri m t s f m ys l f d f V i h m y N S L m h d gy th i g d B t tig P ( V rh d l g L) D t ch 2 1 1 90 2 p 9 8 F d 1 a ) on a ua e a e a e a e e a o o e ea n o on a e on , e s ae un eu s o en . o e o er 00 . o o o ec ec e oun o e u sa n ue an e se u , o . ex e e c o n en eor e . ” er “ . e , ea e nes o on o e o ee an a c on on , . o on e e e o a n e a na s e xa e e se u o ex “ en , on o n en a o an o n n e , e u a an n on a a : un e e , o - ee e e o e e o o an e on n e o . e . on u e an e e u sa s a usa e , o on e ee en e on a o a e, e ne o n o n es an en en e e e e e e a o e o n an e ” n ee a no e . e e a n e s, o on , e a u sa s ec s u an n o e se u a se u e o o onn e e un o, o s e o , a e e ee n e er eco o r o e e n ea o e a e u a o e rz, . o “ on o r. e an a a e e e “ un e ue en Ca re Y o u ng th e of Ki ngd o m i n th e A ni mal . involve u s in endless and hopeless contradictions They are explainable only from the standpoint o f a higher teleological consideration o f nature whic h does not p resum e to replace the wisdom o f the Cre ator ” by the intellige nce o f animal s The ph enomena i n the nursi ng o f ants m e ntioned above can be ascertained o nly by close sci e ntific observation But some oth e r features are known to every amateur in the study o f ants and do not escap e even the most casual observer Th e first thing that strik e s o ur attention i s the great attachm e nt di splayed by the workers for thei r charges They carefully gu a rd them against eve ry disturbance and at the ri sk o f th e ir o w n lives th e y exert all thei r stren gt h in ward ing o ff hostile invaders The whol e colony i s seiz e d with frenzy i f an attempt i s ma de to ro b the m o f 1 thei r larvae an d pupae M erely thru st your stick into a hilloc k o f w ood ants ! A t once there ensues a tumultuou s uproa r and masses of workers ru sh forth to rout the enemy But i f you happen upon a chamb e r filled with pupae an d attempt to take awa y th e coc o ons th e fury o f the ants reaches its cl imax Like an army o f raging furies they fall upon the assailant viciously biting and ej ecting thei r poison Hundreds and thou sands are crushed by the enemy but other hundreds and thou sands are eager t o face the carnage No lioness no sh e monkey ever de fends her young w ith the heroi s m displayed by ant s Workers will rath e r . , , . , . , . . . , . , . - . , . , . , . - , . T h is is th c s wi th sp ci s th rwis v ry p c l vi g g wi th th l r g A m ric l f c t t i g t s f t h g s A tt O p i g s t f A tt F rl v h d r t ry f h i d i Ri Fri li tt l fi g r pi rc d b y l r g h d d w rk r S F r l Z F d L b sw is d A m is i m C l mb i h Urw l d ( M i tt h i l d S c h w iz E t m p V l I X 9th iss 1 ) e e n a ne e e e en . e o a e n e un a e e n o . an se x e e e a e ea ens a er e - u n a o e n o e ea - an o o, o e o o u en o . e e , e sc e en . en ue , a o a . ” e “ , “ n , n . a an a ee o - en u e e ea e e e o o e . . , en s a un a ur e . er C h a p te r I V 1 70 . su ff er thei r heads to be torn o ff than yiel d to the A nd yet e nemy th e pupae they carry i n their j aws “ it i s n o t even for thei r o w n children that they sacri ” fi ce themselves so un se lfi sh l y ; their cha rges are but th e i r foster chil dren But th at higher natural law which has made preservation o f the species th e fore most instinctive commandm e nt implant e d i n the ani mal soul thi s natural law I say al so constrain s the worker ants to risk l i fe and limb i n behal f o f beings begotten by others Thi s commandment they observe faith fully not led by any sense o f duty o r by noble forge t fulness o f sel f but by an i rresistible instinct iv e impulse impl anted i n them by A nother and t o whi ch they yi el d o b edience not intelligently or voluntarily bu t u rged o n by a blin d necessity o f natu re ! To cr e dit animal s with intelligence to ascribe to the m ever so faint a trace o f intellectual knowledge o f the pu rpose o f thei r actions will nece ssarily l ead to extolling the sel f sac ri fi ce o f the single wor k ers for the wel fare o f the colon y and especi ally f o r the young a s a high degree o f quasi human nay o f superhuman vi rtu e A n d i n fact L B uechner E Haeckel Th Eimer O Z acharias an d other modern animal psychol 1 o g i st s have actually ventured such assertions Of course thei r only commen dation i s thei r bol dness but it i s a boldnes s leading to the greatest absu rdities What i s it then that impels th e ants to such heroic devotedness and sel f sacri fi ce for th e offspring o f ” ? thei r colony I s it perhap s motherly l ove ? No ; for the workers are but the si sters o r aunts o f thei r , . , , - , . , , , - . , , , , , , , , - , - , . , . , . , . , . . , , . , - 1 ) Wa sma n n K l i o o n en “ , de r A m e is Die en , ” z s mm g s t z t pp 1 90 d 1 91 u a . en an e e . en N st r e e un d g misch t e en 1 72 Ch ap ter I V ‘ inte lligence and animal ethics is hopelessly i nvolv e d The nu rsing instinct o f ants with all its devoted ” ness an d un sel fi sh n ess i s therefo re nothing el se than a p ur e ly insti nctive impuls e guided and determined in its operations only by sensitive impressions and not by i ntellectual concepts Under normal ci rcumstances this instinctive impulse i s appropriat e ly r e gul ated and mani fests it sel f a s th e product o f sel f sacrifi ci n g ” sisterly love But i f the abnormal i rritation o f the nervou s system o f the ants cau sed by parthenogenesi s has di sturbed the normal sphere o f sensitive impres sions then si ste rly love i s not changed into moth e rly ” “ l ove but into barbarou s unfeelin g cannibali sm ! M odern anim al psychology evidently toys in a “ rather frivolou s manner with the term moth e rly ” love b y applying it to th e nursing i n stincts fo und among ani mal s N o r can the pl e a be advanc e d that with higher animals matters are quite di ff erent than with ants ; f o r w e have prove d abov e that the nurs ing instincts o f ants far surpass in perfection those o f birds and mammal s no t only by thei r quasi intelligent sel f determination in the method o f educati o n but al so by the great un sel fi sh n ess mani fested in nouri sh ing an d de fendin g the ir young I f th e re shoul d be any di ff erence at all it i s in thi s that in the ca re o f th ei r o ff spring the higher animal s betray f or l ess “ ” “ ” intelligence and f o r l ess individu al l iberty than i s found in ants M oreover it is a well known fact that domesti c pigs not sel dom devou r some o f their “ ” litter ; yet pigs are high e r a ni m al s In such cases however the sow sins as little a gainst goo d moral s . , . , - . , , , , , , , . , , , - , - , . , , , - . , , . , , , Ca re o f th e Yo ung K i ng d o m i n th e A n i ma l . as worker ants do by devou ring thei r o wn eggs ; for morality presuppo ses reason and free will ; reflection and consciousne s s o f duty all o f which are wanting t h r o ug h o u t th e a ni mal ki ng d om b eing the e xclusive privil e ge of man That animals in caring for thei r youn g are no t led by r e ason but only by sensitiv e emotions and rep re se n t a t i o n s be comes evi d e nt especially from the ph e Th er e n a m en a of a d o pti o n in the animal kingdom fore these shall fo rm the subj ect of the following section - , - , , . , , . . 3 A d opti on I nsti n cts i n th e A ni mal K i ng d om . . Th e tendency to adopt the o ff spring o f strangers i s shown by al l those animal s which to preserve thei r species are forced to b e stow great care on their o w n progeny Thi s tendency i s foun d among ants n o t only with regard to th e eggs larva e and pupae o f other colonies o f thei r o wn species o r o f all ied species but also with regar d to members o f altogether di f f e ren t orders o f insects living in thei r com munities These ado p tion instincts are responsibl e for the mixed colonies o f slave making ant s the robbe d pupae o f the slave species being nursed a s care fully a s others either b y the m asters o r by the sl aves al ready present in the nest To the sa me instinct o f adoption mu st be re ferred the care bestowed by th e ants o n thei r gen nine g uests o r other n est m ates belongin g t o di ff erent orders o f insects but above all th e sol icitu de with which they rear the larvae o f ce rtain b eetles ( L o mech usa A tem el es X en o d usa ) and th e eggs o f several kinds o f p l an tl i ce Th e adj oining il lustration , , . , , , . - , - , ' . - , , , , . Ch ap ter I V 1 74 . shows th e beetle L o m ech usa st rum osa so often re ferred to and o n e o f its l arvae magnified to four times their natural siz e , , . Fi g L o m e c h u sa ( . 4 a n 5 . st r u M g ifi Fi g l rv . F m o sa ed F ll g r u . ) o wn a . st r u mo sa a ( . . of L o mec h usa M g ifi n a ed ) Th e same adoption instinct occurs also with bi rds although n o t so s eemingly intelligent a s w ith ants The best k nown example i s the hen that rea dily hatches eggs o f oth e r hens ducks geese turkeys etc and extends to all her a dopted children the sam e “ ” motherly care she woul d show to h er o w n chicks 1 G Romanes succeeded e ven in making a hen the foster m other o f some young ferrets which he had substituted f o r the artificial eggs o n which she was hatching The numerou s speci es o f birds wh i ch tend the youn g cuck o o s follow the same l ine o f con duct the onl y di ff erence being that they lavi sh still gr eater care o n these changelings b ecau se they Open thei r mouths w ider in cryi ng f o r fo o d than thei r o w n nestlings The adoption instinct finally i s m et with among mammal s the most bloo d — thi rsty carnivores not excepted Though i t i s a fable that ancient Rome , . - , , . , , , , . , . - , , , . , , , , . , , , . 1 ) “ M enta , l D v l pm e e o en t i l i n t h e An ma K i gd n om . Ch apte r I V 1 76 animals i s a sensual impul s e not g ui ded by rea son and reflection Thi s organico sensitive nature o f the nursing i nstinct also expl ains why it o ft e n extends to th e helpless o ff spring o f other speci e s whose instinctive b e havior i s somewhat simil ar t o that o f the animal s Th e sen s e perception o f these helpless o w n progeny beings stimul ates th e nursing instinct o f the o l d ones ” “ and there fore th e y adopt the young ones o f strangers The sm e ll o f th e l arvae o f L o mech usa strum o sa i s especially attractive to the sanguine slave 1 makers ; besi des these l a rvae in stinctively mimic the attitu des and behavior o f the ant l arvae and although they pos ses s six fe e t th e y do not mak e u se o f them but conduct them selves l ik e h e lples s a n t la rvae Fo r these rea s on s they enj oy th e most care ful attention on A n d as these be e tl e larvae th e part o f th ei r hosts wh en f ed by the ants grow much faster than th e ant l a rva e they impress the instinctive nursing impul se o f the ants far more favorably than the l atter an d h e nce “ ” are the obj ects o f gr e ater tenderness A t any di s t u rb an ce o f the nest the workers first care fo r th e i r “ ” adopted ch il dren and b ring th em to a place o f sa fety b e fore they attend to th e i r o w n o ff spring ; yea they even neglect the rearing o f the l atter thei r only care , . - , , ' - . , . - , , , - . - . , , , , . , , , s c l p t r s l rv wi th w d c l r I cc t f t h ir s h p sc rt i d i M y th ir xp ri m t s wi th l rv f A th m p m m m w h ic h 1 89 7 b y t l rv f m r si m il r t th th s f L m h Th A th m l rv w r i st t ly s iz d pr y d t r t pi c s b y t h b s rv t i s t O t h wh l i t m s t t b f my g i i m g i d t h t t h L m h l rv m k t h m i mp r i t h ir w s si t iv p rc p t i f th t s ; th i m pr ssi is t m st th si m il r b t m r gr b l w h ic h pr b b ly xpl i s w h y th t s pr f r t h ir w th d p t d l rv t 1 Th ) e n o ar o sa n u n e as a ne n on a , o a ae e e an e n e e o e a ae - a o a ae ec e e on usa - e ne a on e e, as a o n . e e a ec o sa a n ae n , e o e u e ss o n e n e o . a re u sa. e a , o e, e e o a a ne e o n e an e o an n ae us o e . a , on o o e e ou o eo e o o n o o an an e a e o ae an eea a f o un d t h o on e e o en c n ot o o a u do a o o e s en e a us - an t o un a e na e a on e , o th e at on e an e no as a e e o e e Care b ein g thei r o f th e Y oung i n th e A n i ma l K i ng do m 1 77 . L omech usa la rvae so dear to them o n account o f their quicker growth and thei r better appetite It does not a ff ect the ants i n the least that the L o m ec h usa la rv ae a g ain and aga in devour the e ggs and young larv ae o f the ant colony by the whole sale ; o n th e contrary they even carry these change l ings t o th e clumps o f eggs and la rvae t o facilitate thei r wor k o f dest ruction Unl ess a superior Wi sdom had provi ded that th e ants themselves by thei r stupi d a ff ection p revent the excessive increase o f th e L o me the numb e r o f these gu ests woul d ch usa population become so large a s to destroy all the sang ui n ea colonies But there i s no danger o f any such calamity ; for the ants deal with the L o mech usa larvae during th e i r pupation j u st as they do with thei r o w n imbed ding them ca re fully i n a vault o f earth A fter a sho rt time the ant l arvae having meanwh il e spun th e i r cocoons are agai n remov e d from the earth Thi s latter measure applied to the L om ech usa larvae proves fatal to them The larva e o f these beetles do n o t Spi n a soli d cocoon but only an extremely flimsy silken w eb whi ch tears as soon a s they are unea rthed ; soon a fter th e L o m ech usa l arvae are again care fully im b edde d at som e other pl ace then they a re taken o ut a gain carried about aga i n im b edded until at l ength they become dry an d perish In thi s manner the folly o f the ants cau ses most o f the L o mech usa larvae to di e before they are change d into pupae ; an d even those which have fortunately entered th e state o f a pupa are o ften unea rthed by the ants and devoured — perhap s from an excess o f a ff ection ? A ccording to my lon g continued observations on the de velopment - , . , - , . , ~ , , . - , , . - , . , - . , , , - , , , . , , 12 , Ch ap ter IV 1 78 . o f L o mech usa strum osa in norm al sang ui nea colonies only those larvae escape destruction which a fter hav ing bee n imb e dded i n thei r littl e cave are f o rg o tten by the a nts ; a ll the rest are h o pele ssly doomed ; o f 1 0 0 larvae th e re fore at most about 1 0 reach the stage o f imago sometimes scarcely o n e Fo r instance in the obs e rvation nest illu strated o n p 2 3 in M a y 1 896 a b out 1 50 L omech usa la rvae the o ff spring o f I O L o m ec h usas were reared und e r the m o st favorable conditions both o f nutrition and t e mperatu r e ; from these 1 50 larvae I obtained— o n e si ng l e L o mec h usa ! Fo r thou sands o f years and i n thou s a nds o f nor m al colonies F sang u i n ea y e ar a fter year repeat the s a me senseless per form ance : first with the greatest devotedness they nurse the L om ech usa l arvae ev e n allowing their o w n o ff spring to be d e vou red by them ; then th e ir stupi d a ff e ction does n o t allow them to l e a ve the l a rvae i n pe a ce du ring th e tim e o f pupation and finally they devou r the pupae Th e y cannot se e that du ri n g thei r pup a t ion L o m ec h usa—la rvae a re to be t reated d i ff er en tly fr o m those o f ant s ; but th i s i s thei r salvation ; for otherwi se their care o f the L o me c h usas woul d lon g ago have brought about the ruin o f thei r o w n race O ne and the same superior Wi s dom has desi gned th a t o n the o n e h and the increase o f the ants be checked by th e i r inconsi derate love for L o m ec h usa str u m o sa and for thei r l arvae and th at o n the other h and the spread o f thi s beetle be kept w ithin limits by the very same unreasonable a ff ection o f the ants By these means so gentle and yet so e ff ective D i vi n e Wi sd o m i s able to m a intain the equilibriu m in nature In the face of such phenomena the defenders - , , , , , . , , . , - , , . , - , , , . . , , , . . , 1 80 Ch ap ter q uarters IV Th e rapi d increase . of p seudo gyn es in that colony therefore was i n proportion to the number o f beetle larvae which had success fully developed in the same nest that year It i s there fore necessary to assume that in san g ui n ea col onies the frequent rearin g o f L omech usa larvae gradually m o di fi es th e n ormal n ursi ng i n sti n ct Thi s modification i s mani fested partly by o f th e a n ts the production o f th e crippled p seudo gyn e s partly by the m o re appropriate treatment o f the L o m ech usa larvae which a fter having b een imbedded in th e i r cradles remain undi sturbed A nts ther e fore grad I s not uall y learn t o modi fy thei r nursing instinct thi s a proo f o f intelligence ? Tru e thei r sensitive co g n i ti o n guidin g thei r instinctive activities m ay furnish the immediate occasion for that tw o fol d modification But w e have p roved in a former essay in discussing 1 th e diff erent form s o f learning that not every modi fi cati o n o f the hereditary instinct occasioned by sense experiences i s due to i ntelligence but only that which mani fests a k no wledge o f the app rOp ri at en ess o f a given action I f ants were gi fted with intelligence they coul d not help understanding that b y improvin g thei r treatm ent o f th e L o mech usaA arvae they cause thei r colony but to peri sh th e sooner j u st as they co n demn i t t o utter destruction by rearing p seudo gyn es Th e latter modificati on o f the nursing i nstinct which leads to th e rearing o f cripples can only b e a patholo gi cal symptom pointin g to a morbi d dis t urb an c e o f the no rmal organic condition o f that . , , - . , , , . , , . , , , . ’ , - . , , , , , , . , , , , . , , , , 1 ) “ p ych isch e I t lli g c i Di e sti nct an d n s n e en e n Fae h i gke i t en l th e A n i ma d er A me g ” Ki n d om, is p en , C h ap . 8 . , 1 11 ; “ In Fi g . Fi g 1 . Fi g . 3 . (A l l fig r s u e ma g ifi n ed to sv e en t im s e th e ir r l siz n a tu a e . ) . 2 . Ch apter IV 182 . made e g b y William M arshall i n hi s L eben und ” Treiben der A meisen ( p where he speaks o f the care given by ants to th e eggs o f p l an t l i ce S ev eral ant species o f the genu s L asi us collect the eggs o f ce r tai n A phides i n th ei r nests Being care fully protected du rin g winter the young aphi des in spring are carried to the plants o n which they find th e i r food Thence M arshall infers that the ants tend the eggs with th e i n tel l i g en t purp ose o f enj oying later o n the “ sweet secr e tions o f the aphides Thi s i s surely a “ very strange phenomenon he says which proves perh ap s better than anythin g else the h i g h d egree of i nt el l i g en ce attained by ants We mu st credit them with a c o nsi d erab l e p ow er o f o bserva ti o n and we mu st th e o w n that they have stud i e d to a certa i n degree ” habits o f their domesticated animal s etc Yet thi s bol d conclu sion is entirely unfounded H o w does Marshall know that th e ants gather the eggs o f th e aphi des with th e intelligent purpose o f rearing aphides ? That there i s some connection betwe e n the eggs o f the aphides an d the aphides themselves is indeed for many ants a subj ect o f sensitive knowl edge an d experience ; but it i s unwarrantable to mi s take this proces s o f instinctive association for i n tel l i gence pr o per Even i f ants i n r e ality tended the eggs o f aphi des only on account o f a combination o f their sensitive experiences this woul d be as yet no proo f o f the ir intel ligence but merely o f thei r memo ry I n real ity however th e case i s di ff erent Take a few newly developed workers o f a L asi us nest and unite them to form an autodi dacti c colony restricted to it s innate instin ct s w ithout a shadow o f experimenta l “ . , . , . . - . , . , . , , . , , , . , . , , , . , . , , . , , Care o Y o un g f th e i n th e A n i ma l k nowledge as to the development K i ng d o m . of aphi des Entrust them with eggs o f those aphi s species which their congen e rs are wont to r e ar and to nurse They will treat them as though they had previou sly studied the habits o f th e s e aphi des ! Hence the fondnes s o f certain ant species for the eggs o f aphi d e s i s a m erely i nsti n cti ve i mp ul se which o f course can be strength ened by s e nsitive e xp e rience It was rather rash for “ M r Marshall to proclaim it boldly as a facul ty o f ” ta ki ng th e f u tur e i n to acc o u n t A l fred Espinas wa s f a r more correct in call ing the aphis nursing o f an t s “ ” an intelli gence non réfl éch i e i e merely analogou s to human reason h aving but a fa int similarity to i ntel ligence p roper th e diff erence b e ing not merely o f 1 degree but o f kind Thi s a n a l og um r a ti o n i s is simply an insti n ctiv e association o f representations assist e d b y se n si ti ve experi e nce In Sp ite o f the pe rfe ction attained in thei r nu rsing of p l an tli ce th e L asi us species are far in ferior to the Fo rmi ca spec i es i n what modern animal p sychology erroneou sly styles intelligence viz : in the ability to profit for the futu re by past experiences It will be i nteresting there fore to examine i n how far the latter “ ant species in taking care of thei r o ff spring co n ” sc i o u sl y fore see th e future Wh enever care i s taken o f the young then also the future is i nsti n cti vely taken into account above al l i n the rearing o f the fem al e ant l arvae ; f o r it depends e ntir e ly on modification s in the nursing whether th e fertilized e gg will pr o duce a f e mal e proper or a worker But only uncritical popular . - , . - , , , . . . - , . . , , , . , ~ . , , . , , , - , , . , , - , . 1 ) “ S ci é té s o an im l s a e ” ( 2d pp . 1 57 , 1 88 , et c . Chap ter I V 1 84 . psychology i s able to confuse i nsti n cti ve i n ten ti o n and i nsti n c ti v e f o resi g h t with i n tel l i g en t i n t en ti o n and i n tel li g en t f o r esig h t Thi s i s made evi dent by the following facts The beetles o f the genus A temel es have thei r larvae reared by cert ai n F o rmi ca sp e cies A t e me l es e ma rg i n at us by F f usc a A t e m e l es par ad o x us b y F rufib arbi s A tem el es pub i col l i s by F r uf a A te m el es pra tenso i d es by F pr a te nsi s The young A te m el es having success fully reached thei r full d e velop m ent either quit th e F o rmi ca n e sts o r are driven out o f 1 them They then move over to M yrmi ca r ubra a n d spend the greater part o f thei r l ives in the nest s o f these ants by whom they are licked and f e d O nly in sp ring i n the m ating season they r e turn to th e i r respective F o rmi ca speci es where they allow th e i r o ff sp rin g to be reare d at the expense o f the ant —l a rvae Fo r whom then are these F o rmi ca species nursing the young A tem el es ? Not for themselves but f o r the M yrmi ca species Th e only consequence o f th e i r adopting the A t emel es larv ae i s the immense damage inflicted on thei r o w n eggs and l arvae by thes e vora “ cions changel ings Where now i s the faculty o f ” int e lli gently taking the future i nto account w ith wh ich M arshall credits hi s ants ? Fo r thou sands o f years th e F o rmi ca again and again have had the sad experience that the pains bestowed o n these beetle ” 2 larvae are but love s labor lost I believe that i f . . - , . . , . , . , . , . , . , , , . “ , , , . - . , , ’ . 1 ) T h is l d r c ll ct iv o o e e n am e c mpris s r ug i n o d is , , 2 a e Am er en o an oun e as Ca mp o n o t us . u su l c i n o d i s a n d e a u sa ro n n o e ee e ne e e o u u u osa a on o o My r mi ca e o r g l ppli s t t h d c ti ) Th s m ic X d i th st s f F r mi c b t l s wi th th r f d f ll g w Iaevi n o d i s ar e e e . of a sca r b ri n o dis, l rv f th N rth ci s ; f t h X d sp c i lly f t h g us the Sp e a n ts, a e a e o o r, e e ae e o en o e o us a en Ch apter I V 1 86 . more and more in the toil s o f their treach erou s gu ests In the face o f such facts animal intelligence i s alto gether untenable O n the other ha n d th e s e f a cts furnish a new ar gu ment proving t h e correctness o f o ur explanation o f the psychic activities o f animal s Bi rds which nu rse th e un fl e dg e d cuckoos do not behave a whi t more reasonabl y than th e ants with regard to thei r L o m ech usa—larvae Because t h e young cuckoo opens its bil l wi der makes more noise and wiggles its stumpy wings more energetically its “ ” foster pa r ents feed it with sp eci a l devot e d n e ss and rather su ff er thei r o w n young to starve M or e ove r they calmly look o n whil st the young cuckoo push e s thei r o w n o ff spring over th e edge o f the nest t o m ak e them fa ll to the ground ; ind e ed it has been observed 1 A mong that the foster par e nts assi st in thi s work birds too the nursing an d adopting instincts are due to the very same laws o f sensitiv e li f e as in ants There is no di scrimination b e twee n their own o ff ” spring and that o f others no i d e a o f consanguinity ” “ parents or chil dren but everywhere w e wit of ness the same unreasoning d e pendence o n instinctive sense imp ressions the appropriat e ness o f wh ich for the wel fare o f thei r own or o f strange sp eci es e scapes the sensitive knowledge of the animal Thi s i s mani f e st al so i n th e care bestowed o n their young by th e highest mammal s the apes Just as within th e same species of ants eggs larvae and pupae are a kind o f international p roperty and are there fore received an d nurse d al so by other colonies ; a s th e eggs o f e ider ducks o f hens and other birds ” , . . , . , , - , . , , - . , , . , , , - , . . , , , , , 1 ) “ Wes tf al en s Thi erl eben , II , 22 Ca re o f th e Y o u ng i n th e A ni ma l K i n g d om 1 87 . hav e the same international character e xtendin g even to the rearing o f the young d e v e loped therefrom ; as in many ants and birds the instinct o f adoption which i s founded o n the external resembl ance be tween the nu rslings o f stranger s and their o w n i s now and th e n extended to entirely di ff erent species ( L o mech usa cuckoo ) : so there i s in apes a similar instinct owing to the same psychological cau ses which proves to “ evi dence the lack o f intel ligence i n animals It i s a well known fact a s t h e thi rd ed o f B r e h m s T i erleben ( p 52 ) has it that apes withou t much ado adopt the ch ildren o f any other species protect them w ith th e utmost tendern e ss and can scarc ely be separated fro m thei r d e ad bodies When ou r shepherd —dog Trina woul d p resent u s again with young puppies swa rm ing with fleas we u sed to put them i nto a cage o f marmoset s There they were hea rt ily welcomed cl e aned an d fondled with care and tendernes s whi lst from without the ol d dog was watch ing with a know in g loo k ( si c ) But a s soon as we deprived them o f th e i r nurslings the monkeys woul d set up a pitiable scream ing : they ha d distributed the pup s among their number and evi dently intended ( si c ) to keep ” th e m The a n th rOp o m o rp h i sm w ith which modern fanatics in the matter o f animal intelligence t ry to varni sh ove r the t rue character o f these adoption phe n o m en a mu st be mercilessly exposed by genuine crit i cal psychology We wi sh to picture the p sychic li fe o f the animal s such a s it i s in itsel f and not as it e xi sts in the ima gination o f woul d b e p sychologists That the incl ination o f apes t o adopt th e o ff sprin g o f other apes o f do g s cats rabbits Guinea pi g s an d , , , , , . ’ - . , . , , , , , . , . , , . , . , , , . , - . - , , , , , 188 Ch ap ter I V . even of man i s an enti r el y i nsti n cti ve impul se devoi d o f intelligent reflection i s so evi dent to logical minds and s o plainly expressed in the facts that further proof seems superfluou s S ince with apes th e two sexes di ff er far l ess i n p sychic endowments th an w ith ants it can hardly be surprising that not only the females but also the males have an i nstinctive nursing incl ination and try to g rati fy it by nursing any young But how do the y do i t especially i f the youn g a nimal 1 ones belong to another species ? Al fred Breh m says “ H er e th e ape o ft e n appears t o be an i n expl i ca bl e He nurses h i s adopte d favorite to the ful l puzz l e extent o f hi s power hugs him cleans h im continuall y keeps an eye on h i m but g en era l ly d o es n o t supply hi m wi th any fo o d Without pangs o f conscience ( si c ) h e k eep s fo r him sel f the foo d destined for hi s nursling an d even ca re fully k eep s hi m away from t he pot wh il st he himsel f i s eating Thi s I have obs e rved w ith baboons who had picked up young dogs o r cats as thei r fost e r ch i ldren “ I s this really an i n expl i ca bl e puzz l e ? O nl y for those who are unwi l l i ng to understand the corr e ct solution becau se they a re blinded by thei r monomania Th e solution o f the puzzle i s o n animal i ntelligence a s cl ear as day l ight The instinct s both o f nursing and o f eating are purel y sensi ti ve i n cl i n ati o ns u nat tended by reason and reflection The faculties o f sensitive cognition and appetite a re so appropriately di sposed in animal s that w i th regard to their o w n o ffspring th e nursing instinct i s stronger than hunger b ut only so lon g as the young o f that species u nder , , . , , , , . , . , , , , . , , . , , - . ” , . - . , . , , , 1 ) Ib i d m e , p . 51 . Ch a p te r I V 1 90 u s b ri efly sum up the re sult s o f o ur discu s sion o n th e nursin g instinct o f animals In th is respect all anim als obey the s ame p sycholo g i cal l aws Every where th e i nclination o i nursing and rea rin g the youn g proves to be a sensi ti ve i nsti n ct enti r e ly di ff erent from and ev e n ex cl udi ng indivi dual reflection and consciou s ness o f duty This is the case both in the high est m ammal s and i n ants ; for the l atter even far surpass the highest mammal s by thei r qu asi intell ige nt fr e edom and by an o f choice i n re a ring the different castes attachment to their charges verging on heroi c un sel fi sh n e ss With all animal s the care o f the young is dir ec ted e xclusively by sensitive i mpul ses and p erc e p tions which under normal circumstanc e s are suitably regulate d both for preserving thei r o w n species and for maintaining the equil ibrium between d i ff e r e n t species Yet thi s app ropriate correlation i s far beyond the k en o f the animal ; hence in the nursing o f an i “ ma l s there is no que stion o f any consciou sn e ss o f duty M an alone by virtue o f h i s intell e ct perceives th e relations of consangu inity and the connections r esultin g the re from ; he alone h a s an i n te l l e ctua l “ “ ” ” n o ti o n o f parents and chil dren ; only with hi m can there be question o f the m oral d uti es o f parents towa rd thei r children True al so in man motherly love is founded o n a sensi ti ve i nsti n ct ; but at th e sam e t im e it i s spi ri tual becau se th e mother knows that sh e i s th e mother o f this chil d and because thi s knowledge with the resultant consciousness o f th e duty o f attending to the wel far e o f the chil d l asts for l i fe In man the love o f parents toward thei r chil dren an d the care they bestow o n them rises far above L et . . , , , . - , . , , , . , . . , , , , , , . C are o f th e Yo ung i n th e A n i m al K i ng d o m 1 91 . the spher e o f sensitive instinct int o the province o f sp irituality and morality : an d becaus e the love o f a moth e r is a ra ti o n al love co nsci o us of d uty there fore i t is the highest and noblest love e xisting in nature To ascribe such motherly love to animal s as do mo dern psychologi sts i s nonsens e scientifically Speaking and morally speaking it i s a degradation o f human di gnity , , . , , , . , CO N CLU S I O N OT to e xceed the limits o f thi s publication we must refrain from pointing out other parallel s e xi sting between t h e p sychi c li fe o f a nt s and that o f the other animal s In part icular the extremely vari ous ways o f gaining a livi n g prevalent i n ant com m un i t i e s woul d furni sh plenty o f material But in thi s essay we h ad to confine ourselves to a few stray remarks on that subj ect ( p W hat w e have dilated upon may su ffice h o wever t o furnish a posi tive and reliable answer to the question with which we i ntroduced o ur essay namely : A r e an i mal s en , . , - , . , . , , , , d ow ed wi th i nsti n c t o n l y, or a l so w i th i nt el l i g en c e ? We have already proved in a former publication A n imal K ingdom ) Instinct and Intelligence in the ( th a t o f which the present stu dy i s a co n firmation modern animal psychology influenced by so called popular p sychology has inverted and con fused th e notions o f sensitive cognition and o f intelligence That which i s popularly styled animal intelligence i n as far as it i s b a sed on real facts and not on fables and anecdotes i s nothing but the faculty o f the ani mal s o f fo rming complex representations o f th e i r sensitive exp e riences and o f actin g appropriately in accordance with them But thi s power as well as th e immediate insti nctive cognition i s due to the innate laws o f a ssociations o f sensitive representations an d a ff ections ; hence it belongs to the sphere o f sensi ti ve , , - , . , , . 192 Co ncl usi on 1 94 . fo rm certain actions which are independent of in di vidual experience and a re more o r less the same in all individu al s o f a given species It i s pl asti c inas much as within thi s limited sphere the pow ers o f cognition and appetite in the animal are given more o r less play fo r variously m odi fying their activiti e s The narrower the l imits within which they are con fined the more automatically thei r instinct wi ll cau se them to act ; the wi der those limits the more plasti c their i nstinct Both elements automatism and pla s t i c i ty are foun d in di ff erent p roportions with all animal s from the highest to the lowest In the l o wer orders automati sm as a g eneral rule largely prevail s whereas in the higher ve rtebrates plasticity i s o n the average more pre domi nant A nts too more than dogs and apes are boun d by heredi tary l aws to the per form ance o f certai n activities The varying i nfluence which indivi dual sensation b ri ngs to bear upon th e p er fo rm ance o f hereditary i nstincts i s great e r an d more variable in the latt e r than in the former and in thi s respect the psychi c l i fe o f ants is more like ” “ automati sm than that o f mammal s But on the other hand th e plasticity o f the instinct i s al so in ants o ften highly developed and not rarely i t i s mani fe sted i n a more quasi intelligent form than even i n the highest vertebrates In the present essay w e have reviewed a number o f the most prominent phenomena o f th e psychi c l i fe and everywhere we found that what o f animal s modern an i mal p sychology styl es animal i ntelligence i s met with al so in ants and in many cases in fa ct in In a hi gher de gree than w ith th e h i ghest mammals , . , , . , , . , , . , , , , . , , , , . , , , . , , , , , - , . , , , , , . Concl usi on 1 95 . ommunity li fe o f ants which w ith suitabl e co operation f o r the wel fare o f the co lony combines a mani fol d independence o f action o n the part o f the single workers in their mutual communications and mutual servi ces in thei r wars i n thei r slave making expeditions and thei r con federations i n thei r nest construction an d i n the mani fol d appl ication o f their building skill to variou s changes o f ci rcumstances finally i n their breeding and nursing embracin g variou s meth ods o f education le ft to the choice o f the workers and mani fest ing at the same time the highest “ ” degree o f sel f sacri fi ci n g attach m ent to their help les s young ones : in all these points combined we must rightly conside r the li fe o f ant s a s th e cl i max of the c - , - , - , , , , , , , , - d evel opmen t i n i nsti n cti ve l i f e thr o ug h o u t th e ki n g d o m a n i mal As regards the perfection o f the nervou s system and o f the sense organs the higher mammal s a re indeed far closer to man than the ants ; but a s regards the quas i intelligent actuation o f animal instinct under th e influence o f sense perceptions an d e xperien ces for the variou s pu rposes o f community l i fe ants no doubt approach nearer to man than even the anth ropoi d apes In deed neither o f them pos sesses i n telli g en ce pr oper that i s to say the power o f actin g with de l iberation and sel f consciousness of inventing new means for attaining variou s purposes and thu s ma k ing progress in civilization S till the chas m between the p sychic l i fe o f animal s and that o f man i s in many respects wi der between ape an d man than b etween ant and man O f cou rse the results o f ou r stu dy are very di f f e ren t from and indeed alto g ether contrary to the . - , , - - , . , , , - , . , , , , . , , , , Concl usi on 1 96 . aprioristi c postulate s o f modern evolutionism accord ing to whi ch man i s n o thing but the highest b rute 1 , 1 g r l q st i f t h e d vel p m t f Cf f m y f r m r p b lic t i s “Di e t h is p rp s ti t E t st h c h D rwi ( S t i m m M ri L c h Di XXV I I I E tw ic k l g d I t i t i d Urw l t ( i b i d XXV III 481 ; XX I X 24 8 E t wic k l gs g sch ich t d Z ll h f t Am i N st r d g misc h t ( D i z s m m g s tz t g K l i d A m is III s c t i 2 C h p ) A xpl ti f th g i g st rel t i s h ip ( sym p h ily ) t th f Zu b y t h D rwi i th ry f v l t i E t wic k l g d I l g B t Z ti t d Wi 1 897 3d ( V h dlg K E ch i c h h iss e pp 1 68 s lv t h Of l t D t ri d t c t r d ict i w h ic h w pr v d t xist b tw th f c ts f d y mp h ily d t h pri cipl s f t r l s l c ti ( Z A t m i P i Bi l g i t Z gl ich i B i t r g K t is d h i Z l g J h b r S ys t m t i k X II My m k p h i l i A b th f 1 898 27 i sist s th t sym ph ily is t s p r t i st i ct H b r d i g i st i c t f t s b t t h t t h t w t t lly d i ff r t f r m th c s l r l t i t ch t h r W f rm rly ( th fi r t G rm d i ss y p 1 0 7 b l w d p 1 08 b v ) p i t d t th s m f pr s t g i b li vi g t h t t r l s l ct i h b Y t Esc h ric h is wr b l t pr v t t h d v l pm t f sym ph ily i pi t f th d m g b y i t t th ts b c s sym ph ily is cl s ly c c t d wi th d b r d i g i sti n t N tu r l s l c t i m s t c t r c t t ly th th w i s t i c t w h ic h pr v s i j ri f s t th d v l pm t t ir ly p ss ss r b t ls t h x t si t i j ri s b j ct s f lr d y x i s t i g s f l i st i c t ; h c s l c ti w j st li tt l ll w d t l t At m l b r d i g i s t i c t f ts x t d i t c ti vi t y t L m h th it w x i s b j ct s ll w d t l t t h f d i g d th r P i s t i ct f i m l s x t d i t ct ivi t y t p l t b l b t p is us h rb s pl ts c v r d wi t h p r si t s ( Cf D i psyc h isc h t t ri ti 1 899 p T gi F eh i g k i t d A m is t h is E c h ric h y sh p th t m b j c t d ( i 2 1 C t l b l 1 899 N 1 p i k ill d b y f di g pl t s c v r d b y th (i c ps l t f r m f d ev l p d t r m t d s ) B t w h t w l d Mr Esch rich y t t h f ll wi g i f wi th i th w h l sp ci s f sh p wi t h i c r t i r c f t h m t h r s h l d d v l p p ci l l i ki g f pl t s c v r d b y t h p r si t s W l d t s ch f di g t r d ic t t h ph m t ly c th ry f t r l s l ct i ? B t e vi d x c tly th c s wi t h t h r ri g f L m h by th t h is is s g i sl v m k rs T h er f r e Esch rich s bj c ti s b t c firm f ss rt i Th f ct t h t by r i g th i r g t t th t r th r t h i g r t t mi i q l l y i c mp ti b l wi th t h p i ci p l l c ti t r l d wi t h t h p r i c i p l i m l p y c h l gy f f m d r 1 t c i sti c ts gd I ) We en n n un e e n te an n o n o ns “ th e on e nc e o e un n “ ns er “ , , e se n e se o nc e s u er a e, ” n e au a en e en e a e e o o e e en o u u e u n or a e n e o n or n ee e e ear on u ne u e r na u a a our a e a es se e on , n o e e e a e a e e en e an e e o . e e on : e s, o e s e e e a o e e ou o se a a eo ea a a ua n u e e e ? n an o o e e a s e e u e on ues s e r n e a a u on u , n a usas on n an ee no e o . o nu s n an s e ou e e ec ee e . ou o ’ es o a na u a o o e a n a a e o e n ee en a o e e e e s, ono s e o e . . ea e cerca r e s e e o e e o . e e e a ” e n o u e . , . n , usa, o , e e o ec e a on an a “ . , e o o a a a a a o e e. e ou o . e en a e u e a as no n as as a as e o e o o an on e - e u as an e o nn e e o s a , o o en a e o a an a on ou ” e o o e a n e n on en o an o e a e n u e n o are on ou n e a o o en u n ou o e n n e on un o sa e or n ee e n s , , e s e e er a a o n e e un c a a e e e na u a on e n ra . o a e e en , e a e e e e o o se e o en n n u , e e a e a an o o na o ue . , e z ur n er o ur a ” e s a an 00 e e “ so e en er “ ou e ous u a e a a en e a re o an o o on an no en en en o n ne e n e e n . e a e e n o nu o n on au e a . o n n ee a ussus a n n a an , e e , en an o , n e c e e o en e ee n e n e e o e an n n ee er n . n e e o n e e o . e en on e e o on o e as no ee ea e u ec r er e en , e e . un . a e o , a . n on u on n er na u a o oo o o e a o e a , e un e ” aa a e e r . s . . : - er n - “ o an . u r c cus, “ e o a e a u ssus , e r o n e o e oo o e von e r un a er . on a un ue c a . en u n e on a us en e a o u e o on, o o o n an an o eo en n e , e a e s n o . , on n an “ ” on en on e an a e e u a e en , e a e en a er o o n en s sc “ ” u o e o e nc e ur , on o ” n a na ue en e a u or e , r he . . er r , s o o es . Co ncl usi o n 1 98 . of thi s theo ry to the results of biologi cal research must i n th e fi rst pl a ce be brand e d as unsci en ti fi c ; for it m i stakes sens a tion for spi ritual li fe and instinct for intelligenc e thu s being diametrically at variance with the principles o f critical p sychology S eco n d l y its assertion that the brute i s gi fted with reason an d consci o usness o f duty as well as man although i n a di ff e rent degree i s an evi d en t fal seh o o d wh ich i s given the lie by the actual biological facts But this p o pular psychology i s not only unscientifi c an d untruth ful ; it i s far worse To be candid i t i s d em o ral i z i n g and fraught with moral danger to the human social order Hence w e must do m ore than merely shrug o ur shoul ders i n contemptuou s pity we mu st take a deci ded stand ag ai nst i t and co mb at it w ith al l o ur might By denying the existence o f the essential di ff er ence between animal and human psychi c faculties thi s psychology not only raises the brute to the level o f m an but degrades man to the l e vel o f the brute Woul d to Go d that thi s were done in theory only ; but alas the practical consequenc e o f th is fal se theory i s th e d em oraliz at i on an d b ru tal i z ati o n of man Th i s i s th e goal aimed at by th o se books and pamphlets , , , . , , , , , . . , . , . , . , , , . , r pr t st I h v lr d y d i C h p I f I st i c t d I lli g c i th A i m l K i gd m t h t t h r is wish my p r t t i d t i f y t h sci t i fi c r pr s t t iv s f m d r z l gic l psyc h l g y wi th t h ch mpi s f i m l i t lli g c li k Br h m B c h r t T h is w l d b i j s t ic t v ry m y s b r mi d d t r list s w h c d m j st w d th h m iz t i im l N d w i r i t d t p ss j d gm t f th y m p rs l m t iv s f Br h m B ch r d t h r d f d rs f th i m l i t lli g c i m l m r li t y b t w ly j d g f t h ir d T h is r m r k is d d d h r xpr ssly t v i d m i d w ri t i gs st d i gs 1 ) L e t me an n n o e o n e e n an n e en a . e c , e o e , n e en e a en e a on o e o an n n o , a an a n ue o a e u e e as e e e an o e a e u on o a o o . no e o ur o en u e an an u en e en e e n e e e o o o e o e e e a n e a n en u n a , n u ne , o an o an e on e e en a e on e ea a n an n e an e e a ou , e o a as e . a or . e . n o na u on a a e en ne e an e an ue , - mo e o o a e c nte a on oo o on a o sun on on o e er C oncl usi on 1 99 . which descri b e the sexual impulse o f the b rute as es sentially th e same as human conj u g al love and the care o f the young among animals as e ssentially i den tical with par e ntal love i n man S uch men as A l f Brehm and L Buechner were not ashamed to come “ ” forward as apostles o f free love and to decry a s antiquated and ridiculou s the moral bounds estab l i sh e d for man by reaso n and d ivine law With them the humani zation o f the b rute consciously or un cb n sci o usl y aim s at degrading man so far as to make him cast o ff hi s reasonabl e nature and to follow with o ut reserve the sensual inclinations which he h as in common with the unreasonabl e brute O n thi s account they deny the di f ference between sensitive and spirit ual faculties between the anim al soul and the human spi rit Hence we do not consi der it too harsh a j u dg ment to say : Th ose w h o h uma ni z e th e a ni mal n o t , . . . . , , , . , . , , o nl y tri fl e w i th sci en ti fi c dr ag i n to th e mi re th e psych o l ogy b ut th ey a l so Ev e ry well di g n i ty o f man , . meaning naturalist there fore ought resolutel y to Oppose th e se unprincipled d o i r g s o f so — called popular psychology Now a —days th ere i s and rightly so a wi desp read agitation against the use o f alcohol and other drugs inj u ri ou s to the ne rvous system becau se th e bo dily and spiritual wel fare o f hum anity i s endangered But to counteract the ravages o f spi ritual venoms which under the gl ittering name o f modern science are spread through all classes o f society little o r nothing is don e I f the moral principles of Breh m an d Buechner shoul d l ater on become th e common property o f humanity then the society o f th e future from the highest to th e , , . ~ , , , , . , , . , Co ncl usi o n 2 00 . lowest woul d resemble a herd of unreason ab l e ani “ mals whose spiritual li fe woul d consi st in the unbri dled gratification o f the meanest lusts and pas sions Hence o ur concluding appeal : D o aw ay w i th , ” , . l b oo ks, pa mphl ets an d peri o di cal s w h o se o n ly p ur l v el o an ! u t t t h e e m o a i se t h e b r e os i s t o r e p f al , U N I V E R S IT Y O F C A L I FO R N I A L IB R A R Y L o s A n ge l e s Thi P S D 2 34 3 sb k oo i s D UE o n th e l a st d a t e sta m p e d b e l o w .
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