INDEX. 389 



D. 



Darwin, Charles, on the relation of intelligence of ants to the size of their hrains, 

 46 ; on movements of plants, 49-51 ; on intelligence of earthworms, 77 ; 

 on special senses of earthworms, 86-7 ; on birds dreaming, 149 ; on mis- 

 taken instincts of humble-bees, 168; on mistaken instincts of an African 

 shrew-mouse, 169 ; on variability and natural selection of instincts, 178 ; 

 on inherited tricks of manner, 185-6 ; on inherited paces of the horse, 

 188; on tumbler and Abyssinian pigeons, 188-90; on instincts of 

 biseacha, 189-90; on inheritance of handwriting, 194; on wildness and 

 tamenessin rabbits, horses, and ducks, 196, and in wild animals, 197; on 

 effects of crossing upon instincts, 198-9 ; on intelligent imitation by 

 animals, 220-2 ; on protrusion of lips by orang-outang, 225 ; on sheep 

 and cattle learning to avoid poisonous herbs, 227 ; on obliteration of 

 ■wild instincts under domestication, 231-2 ; on acquisition of domestic 

 instincts, 236-9; on bees eating moths, 215; on local variations of 

 instinct in birds, 215-6; on the hyaena not burrowing in South Africa, 

 2 I'.t ; on specific variations of instinct as difficulties against the theory of 

 natural selection, 251 ; on parasitic habits ot Molotkrus, 251 ; on adaptive 

 structures developed by natural selection, 253-4; on evolution of 

 instinct, 203-5 ; on similar instincts of unallied animals, 273 ; on dis- 

 similar instincts of allied animals, 274 ; on trivial and useless instincts, 

 274-6; on instincts apparently detrimental, 276-82; on migration of 

 lemming, 282 ; on theory of migration, 287-97 ; on sense of direction, 

 2'.t0-3 ; on instincts of neuter insects, 297-9 ; on instincts of sphex, 

 299 and 303 ; on bees boring corollas of flowers, 220-1, 301-2 ; on instinct 

 of feigning death, 308; on instinct of feigning injury, 316-17; on 

 reason in a crab, 336; on emotions of earthworms, 314; on sexual 

 ■election, 3 1 1-5. 



t For all references to matter now published in the Posthumous 

 Essay on Instinct, see Index to the Kssay. The following are references 



II the quotations from, and allusions to, the unpublished M88 of 

 Mr. Darwin which occur in the pages of the present work.] 



<)n changes produced in instinct by abnormal individual cxpe- 

 lience, 115; on instinctive fear and ferocity in young animals as 

 directed against particular enemies or kinds of prey, 165 ; on mistaken 

 in-i i mi -< <>t" ante, in>>; on instinct of a kitten modified by individual 



e xperi ence, 172; on analogies between instincts in BpeoieS and acquired 

 babits in individuals, 179-80; on diversity of disposition iii birds, 1m; ; 

 on hereditary tlioks Of manner displayed by a child, 185-6, and by a 



terrier, I86j on ptflnliar disposition* and habits transmitted in croco- 

 diles, ducks, bones, and pigeons, L88 9 ; on automatic actions displayed 



by idiots and by an idiotic dog, 198 ; 00 instinctive wildness and taine- 



■ respectively displayed by the progeny «'f wild and tame horses, 

 rabbits, and ducks, 196; on effects npon instinct of crossing, 199) on 

 intelligent modification of instinct in bees, 807 ; on wild ducks building 

 in trees, 211 1 on hive-bees rooking through holes nude in corollas bi 

 humble-bees, 880-1] on dogs learning modes of attack by experience 

 end imitation, -21 ; on birds of one species learning danger cries of 

 birds of another, ~-\ 8| on ■ dug learning by imitation the habits ( ,f i 

 end lambs and cattle learning to avoid poisonous herbs, 824) on 

 oanariee reared in ■ fell oest afterwards constructing a normal nest, 226 1 

 on the non-instinctive character of the drinking rements i<i chickens, 



--^ '.' , on the incorrigibly wild instinct* of sundry wild annuals when 



