E Eagle, 65, 190, 350 Eagle-owl, 221 East, M. E., 79 _Echis carinata_, 224 “Eclipse,” 69 “Edinburgh Review, The,” 38 Eel, 102 Eggs, colours of birds’, 206-9 Egret, 100, 206, 254, 365 Eider-duck, 249 Eimer, 15, 16, 33 Eisig, 222 _Elanoides furcatus_, 282 _Elaps_, 197, 198 Elder, 49 Elementary species, 77, 78, 87, 88, 89 Elk, Irish, 67 _Emberiza citrinella_, 289 _E. pyrrhuloides_, 98 _E. schœniclus_, 98 _Entomophila picata_, 281 Entomophilous flowers, 261 _Epenthesis folleata_, 103 Epilobias, 260 _Equus_, 41 _Erebia manto_, 381 _Erythrura prasina_, 102 “Essays on Evolution,” 11, 173, 177, 181, 184, 213, 223, 226, 227, 229, 230, 231, 234, 237, 238, 239 _Estrelda cyanogastra_, 104 _E. phœnicotis_, 104 Ether, 152, 153 _Euchelia jacobacæ_, 227 Eurasian, 140 European, 140 _Euxenura maguari_, 282 Evening primrose, 84, 85, 88 “Evolution of Sex, The,” 306 Existence, struggle for, 31, 32 Eye-colour in human beings, 310 Eyesight of birds, 211, 237-41 —— insects, 264 Eyton, 15 F “Faery Year, The,” 196 Falcon, 204, 246, 250 _Falco peregrinator_, 251 _F. severus_, 251 False mimicry, 243 Faults in poultry, 64 Ferrets, 100, 119 Finch, 117, 120 —— Bicheno’s, 105 —— chestnut-breasted, 98 —— cut-throat, 122 —— Gouldian, 98 —— Nonpareil, 102 —— red-headed, 142 —— ringed, 104 —— saffron, 244 —— yellow-rumped, 98 Finn, 99, 102, 115, 131, 179, 216, 219, 220, 235, 241, 255, 304, 309, 310, 313, 315, 316, 358 Fittest, survival of the, 32 Flowers, 65, 66 Flowers, colours of, 258-75 Fly-catchers, 44, 45, 47, 285, 338 Flying squirrel, 243 “Fortnightly Review, The,” 37, 38 Foul-brood, 353 Fowl, 56, 58, 61, 64, 65, 99, 101, 125, 127, 128, 282, 301, 302, 307, 314, 330, 336, 338, 339, 361, 362, 364, 365 Fowl-ducks, 125 Foxes, 101, 131, 190, 191 Fox-terrier, 19 Franqueiro cattle, 95 _Francolinus pondicerianus_, 337 Friar-bird, 249 _Fringella coelebs_, 209 Fritillary butterfly, 103 Frog, 325 Fruits, colours of, 258, 275 _Fuligula marila_, 290 Fulmar petrel, 190 Function, change of, 36, 37 Fungi, 263