INDEX. 



377 



EXTINCTION of lower races, 318. 



FEMALE birds, colours of, 114; 

 sometimes connected with their 

 mode of nidification, 240 ; more 

 exposed to enemies than the 

 males, 248. 



FEMALE butterflies generally dull- 

 coloured, 259. 



FEMALE insects, mimicry by, 110, 

 259; colours of, 113. 



FEMALE sex, has no incapacity for 

 as brilliant colouration as the 

 male, 247 ; in some groups re- 

 quires more protection than the 

 male, 258. 



FISHES, protective colouring of, 55. 



FISSIROSTRAL birds, nests of, 238. 



FLOWERS, causes of colour in, 127. 



FLYCATCHERS, genera of, absent 

 from Celebes, 177. 



FORBES, EDWARD, objections to his 

 theory of Polarity, 17-23. 



FORCE is probably all Will-force, 

 366. 



GALAPAGOS, 10. 



GALTOX, Mr., on range of intellec- 

 tual power, 339. 



GANOCEPHALA, 298. 



GastropacJia qucrci, protective co- 

 lour and form of, 6:?. 



GAUDRV, M., on fossil mammals of 

 Greece, 299. 



GEOGRAPHICAL distribution, de- 

 pendent on geologic changes, 1 ; 

 its agreement with law of in- 

 troduction of new species, 9 ; 

 of allied species and groups, 12. 



GEOLOGICAL distribution analogous 

 to geographical, 13. 



GEOLOGY, facts proved by, 2-5. 



GIRAFFE, how it acquired its long 

 neck, 42. 



GL.EA, autumnal colours of this 

 genus, 62. 



GOULD, Mr., on sexual plumage of 

 Gray Phalarope, 115; on incu- 

 bation by male Dotterell, 115. 



Grallina ausindis, 254. 



GREEN birds almost confined to 

 the tropics, 52. 



G-ymnocerus cratosomoides, 94. 



Gymnocerous capucinus, 96. 



Gymnocerous dulcissimus, 97. 



GUNTIIER, Dr., on arboreal snakes, 

 55 ; on colouring of snakes, 102. 



G-ynecia dirce, 59. 



HABITS, often persistent when 

 use of them has ceased, 234 ; of 

 children and savages analogous 

 to those of animals, 235 ; if 

 persistent and imitative may be 

 termed hereditary, 235, 236. 



HAIRY covering of Mammalia, use 

 of, 344 ; absence of, in man re- 

 markable, 345; the want of it 

 felt by savages, 346 ; could not 

 have been abolished by natural 

 selection, 348. 



Harpagus diodon, 107. 



HEILIPLUS, a hard genus of Cur- 

 culionidae, 94. 



HELICON ID.E, the objects of mimi- 

 cry, 77 ; their secretions, 88 ; 

 not attacked by birds, 79; some- 

 times mimicked by other Heli- 

 conidjE, 85. 



HELLADOTHERIUM, 300. 



HEMIPTERA, protected by bad 

 odour, 72. 



