392 



INDEX. 



size of the sexes in Crustacea, i. 323; on 

 the colors of Crustacea, i. 326. 



Bates, H. TV., on variation in the form of 

 the head of Amazonian Indians, i. 107 ; 

 on the proportion of the sexes among 

 Amazonian butterflies, i. 301 ; on sexual 

 differences in the wmgs of butterflies, i. 

 835 : on the field-cricket, i. 342 ; on Py- 

 rode$ pulcherrimus. i. 356; on the 

 horns of Lamellicorn beetles, i. 359, 360; 

 on the colors of Epicalim, <*tc, i. 376 ; 

 on the coloration of tropical butterflies, i. 

 379 ; on the variability of Papilio Sesos- 

 tris and Chilrirence, "i. 390 ; on male and 

 female butterflies inhabiting- different sta- 

 tions, i. 390 ; on mimickry, i. 398 ; on the 

 caterpillar of a Sphinx, i. 402 ; on the 

 vocal organs of the umbrella-bird, ii. 56 ; 

 on the toucans, ii. 217 ; on Brachyiirus 

 ccilmis, ii. 295. 



Batokas, knocking out two upper inci- 

 sors, ii. 324. 



Batr acuta, ii. 24; eagerness of male, i. 

 263. 



Bats, sexual differences in the color of, ii. 

 272. 



Battle, law of. i. 175; among beetles, i. 

 363 ; among birds, ii. 38 ; among mam- 

 mals, ii. 229, et seq. ; in man, ii. 308. 



Beak, sexual difference in the forms of 

 the, ii. 37 ; in the color of the, ii. 69. 



Beaks, of birds, bright colors of, ii. 217. 



Beard, development of, in man, ii. 302 ; 

 analogy of the, in man and the quadru- 

 mana, ii. 304 ; variation of the develop- 

 ment of the, in different races of men, ii. 

 306; estimation of, among bearded na- 

 tions, ii. 333 ; probable origin of the, ii. 356. 



Beards, in monkeys, i. 1S4 ; of mammals, 

 ii. 269. 



Beautiful, taste for the. in birds, ii. 103 ; 

 in the quadrumana, ii. 282. 



Beauty, sense of, in animals, i. 61 ; appre- 

 ciation of. by birds, ii. 107 ; influence of, 

 ii. 322. 327 ; variability of the standard 

 of, ii. 353. 



Beavan, Lieut., on the development of the 

 horns in Cervus Eldi, i. 279. 



Beaver, instinct and intelligence of the, 

 i. 36, 37 ; voice of the, ii. 264 ; castoreum 

 of the, ii. 266. 



Beavers, battles of male, ii. 228. 



Beciistein. on female birds choosing the 

 best singers among the males, ii.- 49 ; on 

 rivalry in song-birds, ii. 50 ; on the sing- 

 ing of female birds, ii. 51 ; on birds ac- 

 quiring the songs of other birds, ii. 52 ; 

 on pairing the canary and siskin, ii. 110; 

 on a subvariety of the monk pigeon, ii. 

 126 ; on spurred hens, ii. 154. 



Beddoe, Dr., on causes of difference in 

 stature, i. 111. 



Bee-eater, ii. 53. 



Bees. i. 70; destruction of drones and 

 queens by, i. 77; pollen -baskets and 

 stings of, i. 149 ; female, secondary sexu- 

 al characters of, i. 246 ; difl'erer ce of the 

 Bexes in, i. 354. 



Beetle, luminous larva of a, i. 335. 



Beetles, i. 355 ; size of the cerebral gan- 

 glia in, i. 140 ; dilatation of the fore tarsi 

 in male, i. 333 ; blind, i. 356 ; stridulation 

 of. i. 366. 



Belgium, ancient Inhabitants of, i. 228. 



Bell, Sir C on emotional muscles in man, 

 i. 5 ; " snarling muscles," i. 122 ; on the 

 hand, i. 136. 



Bell, T., on the numerical porportion of 

 the sexes in moles, i. 296; on the newts, 

 ii. 23 ; on the croaking of the frost, ii. 

 25; on the difference in the coloration 

 of the sexes in Zootoca vivipara, ii. 35; 

 on moles fighting, ii. 228. 



Bell-bird, sexual difference in the color 

 of the, ii. 75. 



Bell-birds, colors of, ii. 218. 



Benevolence, manifested by birds, ii 

 104. 



Bennett, A. "W., on the habits of Dromoa- 

 U8 irroratus, ii. 196. 



Bennett, Dr., on birds of paradise, ii. 85. 



Bernicla antarctica, colors of, ii. 218. 



Bernicle gander pairing with a Canada 

 goose, ii. 109. 



Bettoni, E., on local differences in the 

 nests of Italian birds, ii. 163. 



Bhoteas, color of the beard in, ii. 304. 



Bhringa, disciform tail-feathers of, ii. S6. 



Bibio, sexual differences in the genus, i. 

 338. 



Bichat, on beauty, ii. 338. 



Bile, colored, in many animals, i. 314. 



Bi.mana, i. 1S3. 



Birds, imitations of the songs or other 

 birds by, i. 42; dreaming, i. 44; lan- 

 guage of, i. 53 ; sense of beauty in, i. 61 ; 

 pleasure of, in incubation, i. 76; male, 

 incubation by, i. 203 ; and reptiles, alli- 

 ance of, i. 204 ; sexual differences in tho 

 beak of some, i. 247 ; migratory, arrival 

 of the male before the female, iT251 ; ap- 

 parent relation between polygamy and 

 marked sexual differences in, i. 261 ; 

 monogamous, becoming polygamous un- 

 der domestication, i. 262; eagerness of 

 male in pursuit of the female, i. 263; 

 wild, numerical proportion of the sexes 

 in, i. 297; secondary sexual characters 

 of, ii. 36 ; difference of size in the sexes 

 of, ii. 41 ; fights of male, witnessed by fe- 

 males, ii. 46 ; display of male, to capti- 

 vate the females, ii. 47 ; close attention 

 of, to the songs of others, ii. 50; acquir- 

 ing the song of their foster-parents, ii. 

 52; brilliant, rarely good songsters, ii. 53 ; 

 love-antics and dances of, ii. 65; colora- 

 tion of, ii. 71, et seqg. ; moulting of, ii. 

 77, et seqq. ; unpaired, ii. 99 ; male, sing- 

 ing out of season, ii. 102; mutual affec- 

 tion of, ii. 104; in confinement, distin- 

 guish persons, ii. 105; hybrid, produc- 

 tion of, ii. 109; European, number of 

 species of, ii. 119; variability of, ii. 119; 

 gradation of secondary sexual characters 

 in, ii. 129; obscurely colored, building 

 concealed nests, ii. 161; young femala 



