DOLICHOCEPHALIC. 



INDEX. 



639 



with a sick cat, 103 ; sympathy of, 

 with his master, 108 ; their posses- 

 siou of conscience, 103; possible use 

 of the hair on the fore-legs of the, 

 151; races of the, 176; numerical 

 proportion of male and female births 

 in, 246; sexual sift'ection between in- 

 dividuals of, 524; howling at certain 

 notes, 569 ; rolling in carrion, 530. 



nolichocephalic structure, possible 

 cause of, 56. 



Dolphins, nakedness of, 56. 



Ooniestic animuls, races of, 176 ; 

 change of breeds of, 596. 



Domestication, influence of, in re- 

 moving the sterility of hybrids, 172 



D'Orbigny, A., on the influence of 

 dampness and dryness on the colour 

 of the skin, 193; on the Yuracaras, 

 582. 



Dotterel, 477. 



rvoubleday, E., on sexual differences 

 in the wings of butterflies, 277. 



— — , H. on the proportion of the 

 sexes in the smaller moths, 251 ; 

 males of Lasiocampa quercus and 

 on the attraction of the 6'a- 

 tumia carpini by the female 252 ; 

 on the proportion of the sexes in 

 the Lepidoptera, 252 ; on the tick- 

 ing of Anobium tesselatum, 306 ; 

 on the structure of Ageronia 

 feronia, 307 ; on white butterflies 

 alighting upon paper, 317. 



Douglas, J. W., on the sexual differ- 

 ences of the Hemiptera, 281 ; on the 

 colours of British HoTnoptera^ 282, 



Down, of birds, 390. 



DracOj gular appendages of, 355. 



Dragonet, Gemmeoi's, 336. 



Dragon-flies, caudal appendages of 

 male, 276 ; relative hize of the 

 sexes of, 279 ; difference in the 

 sexes of, 290; want of pugnacity 

 by the male, 291. 



Drake, breeding plumage of the, 393. 



Dreams, 74 ; a possible source of the 

 belief in spiritual agencies, 94. 



Drill, sexual difference of colour in 

 the, 538. 



Vntmceus^ irroratus, 478. 



Uromolcea, Saharan species of, 456. 



Drongo shrike, 461. 



Drougos, racket-shaped feathers in 

 the tails ot; 384, 392. 



Dryness, of climate, sujiposed influence 

 of, on the colour of the skin, 193. 



Dryopithecus, 155. 



Buck, harlequin, age of mature plu- 

 mage in the, 483; breeding in im- 

 mature plumage 484-. 



, long-tailed, preference of male, 



for certain females, 420. 



, pintail, pairing with a wigeon, 



414. 



, voice of the,' 374 ; pairing with 



a shield-drake, 414 ; immature 

 plumage of the, 466. 



, wild, sexual differences in the 



219 ; speculum and male charac- 

 ters of, 236 ; pairing with a pintail 

 drake, 415. 



Ducks, wild, becoming polygamous 

 under partial domestication, 219 

 does and cats recognised by, 412. 



Dufosse, Dr., sounds produced by tish, 

 347. 



Dugong, nakedness of, 56 ; tusks of, 

 502. 



Dujar-din, on the relative size of the 

 cerebral ganglia in insects, 54. 



Duncan, Dr., on, the fertility of early 

 marriages, 138 ; comparative health 

 of married and single, 140. 



Dupont, M., on the occurrence of the 

 supra-condyloid foramen in the 

 humerus of man, 22. 



Durand, J. P., on causes of variation, 

 30. 



Dureau de la Malle, on the songs of 

 birds, 86 ; on the acquisition of au 

 air by blackbirds, 370. 



Dutch, retention of their colour by 

 the, in South Africa, 193. 



Duty,'sense of, 97. 



Duvaucel, female Ifylobates washing 

 her young, 70. 



Dyaks, pride of, in mere homicide, 117. 



Dynastes, large size of males of, 279. 



D.ynastini, stridulation of, 303. 



Vytiscus, dimorphism of females of, 

 276 ; grooved elytra of the female, 

 276. 



E. 



Eagle, young Cercopithecus rescued 



from, by the troop, 101. 

 , white-headed, breeding in tra 



mature olumae^p, 4S4. 



