IXDEX. 



505 



BAR 



powers of communication in bees, 

 157 ; origin and development of 

 cell-making instinct, 173-7 ; in- 

 stincts of neuters, 181 ; quotation 

 in MS. from Sir B. Brodie on bees 

 supporting their combs, 185-6 ; 

 his ' law of battle ' in relation to 

 spiders, 205 ; intelligence of crab, 

 233; his theory of sexual selec- 

 tion, 279-82; sense of smell in 

 vultures, 286; on Wallace's theory 

 of correlation between colour of 

 sitting birds and form of their 

 nests, 299; instincts of cuckoo, 

 301-6; birds dreaming, 312; 

 Gauchos taming wild horses, 329 ; 

 memory of horse, 330 ; intelligence 

 of bear, 352; of elephant, 398, 

 402 ; collective instinct of wolves, 

 436 ; duration of memory in dogs, 

 438 ; intelligence of Eskimo dogs, 

 462; reasoning of retriever, 463-4; 

 maternal care and grief of mon- 

 key, 472; sense of ludicrous in 

 monkeys, 476 ; curiosity and imi- 

 tativeness of monkeys, 477 ; imi- 

 tativeness of man, 477-8; intel- 

 ligent observation displayed by 

 monkeys, 479, 480 



Darwin, Erasmus, on bees ceas- 

 ing to store honey in Barbadoes, 

 187 ; wasp dismembering tiy to 

 facilitate carriage, 195 ; un- 

 moulted crab guarding moulted, 

 233 ; crows breaking shells by 

 dropping tliem on stones, 283 ; 

 bird shaking seed out of poppy, 

 286 ; elephant acting nurse to 

 young child, 408 



Darwin, F., on bees biting holes 

 through corollas, 1 89 



Davis, on instincts of larvas of bom- 

 byx moth, 239 



Davy, Dr., on instincts of alligators, 

 256, 257 ; taming cobra, 265; per- 

 forming operation on elephants, 

 400 



Davy, Sir H., on eagles teaching 

 young to fly, 290 



Day, F., on intelligence of fish, 244- 

 5~2 



Deceitfulness, of elephant 410; of 



DZI 



dog, 443, 444, 450-52, 457, 458 ; 

 of monkey, 494 



Deer, intelligence of, 336, 338, 

 339 



De Fraviere, on powers of communi- 

 cation in bees, 1 58 ; their scouts, 

 168 



Descartes, his hypothesis of animal 

 automatism, 6 



Dicquemase, on intelligence of 

 oyster, 25 



Dipterous insects, intelligence in 

 finding way out of a bell- jar, 153, 

 154: gad-fly, 230; house-fly, 230, 

 231 



Division of labour, see Co-opera- 

 tion 



Dog, ringing bell, 423; knocking 

 knocker, 423 ; collective instinct 

 of, 435, 436 ; general remarks on 

 psychology of, as influenced by 

 domestication, 437, 438 ; memory 

 of, 438 ; emotions of, 438-45 ; 

 pride and sensitiveness, 439-42 ; 

 intolerance of pain, 441 ; emula- 

 tion and jealousy, 442, 443 ; sense 

 of justice, 443 ; deceitfulness, 443, 

 444 ; sense of ludicrous and dis- 

 like of ridicule, 444, 445 ; general 

 intelligence of, 445-70; communi- 

 cating ideas, 445-7 ; instances of 

 reason, 447-69 



Doldorff, on climbing perch, 248, 

 249 



Dolomcdes fimlriata, 213 



Doras, 248 



D'Osbonville, on monkeys adminis- 

 tering corporal chastisement to 

 their young, 482, 483 



Dreaming, of birds, 269, 312 ; of 

 ferrets, 347 



Duchemin, M., on toads killing carp, 

 254 



Duck, conjugal fidelity of, 270, 

 271 ; conveying young on back, 

 289 



Dugardin,on communication among 

 ants, 49 ; in bees, 156 



Duncan, on cunning of a dog, 451 



Dzierzon, on cause determining sex 

 of bees' eggs, 162 ; bees repairing 

 injuries to their cells, 186 



