DOLICHOCEPHALIC. 



INDEX. 



EAGLE. 



639 



with a sick cat, 103 ; sympathy of, 

 with his master, 103; their posses- 

 sion 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 affection between in- 



dividuals of, o. 



4; howling at certain 



notes, 569 ; rolling in carrion, 530. 



Dolichocephalic structure, possible 

 cause of, 56. 



Dolphins, nakedness of, 56. 



Domestic animals, 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. 



Doubleday, E., on sexual differences 

 in the wings of butterflies, 277. 



■ , II. on the proportion of the 



sexes in the smaller moths, 251 ; 

 males of Lasiocampa quercus and 

 on the attraction of the 8a- 

 turnia carpini by the female 252 ; 

 on the proportion of the sexes in 

 the Lepidoptera, 252 ; on the tick- 

 ing of Anobium tessclatum, 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 Ilemiptera, 281 ; on the 

 colours of British Horaoptera, 282. 



Down, of birds, 390. 



Draco, gular appendages of, 355. 



Dragonet, Gemmeons, 336. 



Dragon-flies, caudal appendages 

 male, 276 ; relative size of 



sexes 

 sexes 



of 

 the 

 the 

 of, 290 ; want of pugnacity 



of, 279 ; difference in 



in 



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 



the, 538. 

 Dromozus, irroratus, 478. 

 Dromolcea, Saharan species of, 456 

 Drongo shrike, 461. 

 Drougos, racket-shaped feathers 



the tails of, 384, 392. 



Dryness, of climate, supposed influence 

 of, on the colour of the skin, 193. 



Dryopithecus, 155. 



Duck, 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 



in 



219 ; speculum and male charac- 

 ters of, 236 ; pairing with a pintail 



drake, 415. 

 Ducks, wild, becoming polygamous 



under partial domestication, 219 



dogs and cats recognised by, 412. 

 Dufosse, Dr., sounds produced by Ash, 



347. 

 Dugong, nakedness of, 56 ; tusks of, 



502. 

 Dujardin, 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. 

 Duieau de la Malle, on the songs of 



birds, 86 ; on the acquisition of an 



air by blackbirds, 370. 

 Dutch, retention of their colour by 



the, in South Africa, 193. 

 Duty, sense of, 97. 

 Duvaucel, female Ilylubatcs washing 



her young, 70. 

 Dyaks, pride of, in mere homicide, 117. 

 Dynastcs, large size of males of, 279. 

 Dynastini, stridulation of, 303. 

 Dytiscus,~- dimorphism of females of, 



276 ; grooved elvtra of the female, 



276. 



E. 



Eagle, young Cercopithccus rescued 



from, by the troop, 101. 

 , white-headed, breeding in id 



mature Dlumagr, 494, 



