402 



INDEX. 



DonoLAS, J. "W., on the sexual differences 

 of the //emiptera, i. 339 ; on the colors 

 of IJriHsh riomojitera, i. 841. 



Down, of birds, 11. 77. 



Jhraco. (Hilar appondapes of, II. 81. 



l)RA<ioNET, Ui'iiiini-ou.s. ii. 7. 



Draoon-fi-iks. caudal apj)enda(res of male, 

 1. ftW ; relative size of llie sexes of, i. *J7; 

 diffei-ence in the sexes of, i. 351 ; want of 

 pupnacity by the male, i. 3.5;}. 



Drake, breeding pluinat'e of the. il. SI. 



DREA.M8, i. 44 ; a possible source of the be- 

 lief in spiritual afreucie-s, i. 04. 



Drill, sexual difference of color in the, ii. 

 2TS. 



Dromaim irrm-atnx, ii. 196. 



DromoUia. Saharan species o^ ii. 164. 



Dronoo shrike, ii. 171. 



Drongos, nieket-shaped feathers in the 

 tails oC ii. 7(1. 80. 



Dryness, of cliuiate, supposed influence of, 

 on the color of the skin, i. 233. 



Dn/ojHthecuM. i. IStl. 



DccK, harlequin, aire of mature phimape in 

 the, ii. 2(>4 ; breeding in immature plu- 

 mage, ii. 205. 



DccK, lonfT-tjiiled, preference of male, for 

 certain females, ii. 117. 



Duck, pintail, pairing with a wigeon, ii. 

 109. 



Duck, voice of the, ii. 57 ; pairing with a 

 shield-drake, ii. 109 ; immature plumage 

 of the, ii. 1»0. 



Duck, wild, sexual differences in the, 1. 

 260; speculum and male characters of, 

 1. 2S1 ; pairing with a pintail drake^ ii. 

 110. 



Ducks, dogs and cats recognized by. ii. 106 ; 

 wild, becoming polvgamous under partial 

 domesticatiou, i. 2ftl. 



DuooNo, tusks ot ii. 231 ; nakedness o^ 1. 

 142. 



DuJARDiN, on the relative size of the cere- 

 bral ganglia in insects, i. 139. 



Duncan, Dr., on the fertility of early mar- 

 riages, i. 167. 



DUPONT, M., on the occurrence of the sn- 

 pra-condyloid foramen in the humerus 

 of man, i". 28. 



Durand, J. P., on causes of variation, i. 109. 



DlTREAU de la Malic, on the songs of birds, 

 i. .53 ; on the acquisition of an air by black- 

 birds, ii. 52. 



Dutch, retention of their color by the, in 

 South .\frica. i. liVi. 



Duty, sense of, i. 67. 



DuvAucEL, female Ilyiohates washing her 

 young, i. 39. 



Dyaks. pride of, in mere homicide, i. 90. 



DyniiKteji, large size of males of i. 337. 



Dynastini, strldulation of. i. 369 



J>ytiMCtn<^ diinoriibisin of females of, i. 333; 

 grrooved elytra of the female, i. 333. 



E. 



Eaole, young OrcoptVAeciM rescued from, 

 by the troop, i. 72. 



Eaoi.r, white-headed, breeding In Imma- 

 ture plumage, ii. 205. 



Kakles, golden, new mates found by, U. 

 100. 



Ear, motion of the. 1. 20 ; external shell of 

 the. useless in man, i. 21 ; rudimentary 

 point (if the. in man. i. 21. 



Ears. i)iercing and ornamentation of the, 

 ii. .32.5. 



Eclii'hui. i. 193. 



Kchini, bright colors of some, i. 818. 



EciiiNODERM ATA, abscnce of secondary sex- 

 ual characters in, i. 812. 



EcKEH. figure of the human embrj-o. 1. 15; 

 on sexual (litferences in the pelvis in man, 

 ii. 3(»2 ; on tin- ]insence of a sagittal crest 

 in .\ustr.ilians. ii. 3(4. 



EuENTATA. former wide range of in Amer- 

 ica, i. 211; absence of secondary sexual 

 characters in. i. 259. 



FiloliuM^ racket-shai)ed feathers in, ii. 70. 



EnwAuns, Mr., on the jiroportion of tho 

 sexes in North American species of Pa- 

 pilio. i. .SOI. 



EoERToN, Sir P., on the use of the antlers 

 of deer, ii. 241 ; on the paiiing of red deer, 

 ii. 257 ; on the bellowing of stags, ii. 261. 



Eggs, hatched by male fishes, ii. 19. 



Egret, Indian, sexes and young of^ ii. 203. 



Egrets, breeding plumage of, ii. 7!) ; white, 

 ii. 21 S. 



EnRENHERG, On the mane of the male Ha- 

 niadryas baboon, ii. 2.55. 



Ekrtikim. M.. on lltireUlti glaeiaiiH. ii. 117. 



Ehtchitita riifo<:hierea, habits of male, i. 

 303. 



Eland, development of the horns of the, L 

 2S0. 



Elands, sexual differences of color in, ii. 

 274. 



Elii])komyin. sexual differences in, t. 838. 



EliiphvuM ii/iginoxuji, stridulation of^ i. 368. 



EUipn, ii. 30. 



Elaterid-e, proportions of the sexes in, 1. 

 305. 



Elaters, luminous, i. SH5. 



Elephant, i. 193; nakedness of the. 1.145; 

 rate of increase of the, i. 180; Indian, 

 polvgamous habits of the, i. 259 ; pugna- 

 city of the male. ii. 229 ; tusks of, ii. 231, 

 232, 237, 247 ; Indian. iiio<le of tighting, 

 of the, ii. 245 ; male, odor emittiHl by the, 

 11. 266; attacking white or grav horses, 

 ii. 281. 



Elevation of abode, modifWng influence 

 of. i. 116. 



Elimination of inferior individuals, 1. 165. 



Elk, ii. 237 ; winter change of the, iL 284. 



Elk, Irish, horns of the, ii. 247. 



Ellice Islands, beards of the natives, ii. 

 307. 3:«. 



Elliot, K., on the numerical proportion of 

 the sexes in young rats, i. 296 ; on tho 

 proportion of the se.\es in sheep, i. 296. 



Elliott, D. O.. on Peiecanus erythro- 

 rhyn<ihufi. ii. 77. 



Elliott, Sir W., on the polygamous hab- 

 its of the Indian wild -boor, i. 259. 



