DAR 
INDEX, 
505 
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, 
304-6; 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 Gy to 
facilitate carriage, 195 ; un- 
moulted crab guarding moulted, 
233 ; crows breaking shells by 
dropping them 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, 189 
Davis, on instincts of larvae 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 
Dav, F., on intelligence of fish, 244- 
52 
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, 158 ; their scouts, 
168 
Descartes, his hypothesis of animal 
automatism, 6 
Diequemase, 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 ; genera] 
intelligence of, 445-70; communi- 
cating ideas, 445-7 ; instances of 
reason, 447-69 
Doldorff, on climbing perch, 248, 
249 
Do low. edes fimbriata , 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 toadskilling 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 
