392 



INDEX. 



Bizp of tho BPxra In rrnstnoea, I. 82-3 ; on 

 the colors ofcrustacoii, i. 32(i. 



Bates, H. W., on vnriiition in the form of 

 the lir.'ul of Amazonian Indians, i. 10"; 

 on the proportion of the .loxes anionjj 

 Amazonian Initterllies, i. 3(11 ; on pexual 

 (lifferencfs in tlie winjrs of huttcrllies, 1. 

 8;J5: on tlie (leld-ciiclcet, i. 342; on /'//- 

 rmle* pii/c/ierriniiiti, i. 3.'jO; on the 

 horns of 1 jiniellicom beetles, i. 8.59, 860; 

 on the eolors of f'jticd/iir. etc.. i. 376 ; 

 on the coloration of tropica! hiittorflies. 1. 

 879; on tlic varialiiiily «( /'<ij>i7iu Simik- 

 tri» ain\ ('hildreiKt: i. I}!MI; on male and 

 female butterllies inhahitin)! dillVrent stJi- 

 tions, i. 390; on mimickry, i. 3US; on the 

 caterpillar of a Sphinx, 1. 402; on the 

 vocal orpins of the umbrella-bird. ii. liC; 

 on the toucans, li. 217 ; on Bracliyiirim 

 culrtio, ii. 295. 



Batokas, linocking out two upper inci- 

 sors, ii. 324. 



Batracuia, 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. 88 ; among mam- 

 mals, ii. 229, ft 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. 21T. 



Beard, development ot; in man, ii. 802 ; 

 analogy of the, in man and the quadru- 

 iiiana, ii. 304; variation of the develop- 

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

 806; estimation of. among bearded na- 

 tions, ii. *?:? ; jn-obable origin of the, ii. 356. 



Beards, in monkeys, i. 1$4; of mammals, 

 ii. 269. 



BEAi'TiKn, taste for the, in birds, ii. 103; 

 in the quadruman.-i, ii.,2S2. 



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

 ciation of by binl.s. ii. 107; influence of, 

 ii. 322. 327 ; "variability of the standard 

 of, ii. 3rw3. 



Beavan. Lieut., on the development of the 

 horns in Cerrtix Ehli. i. 279. 



Br.AVER, instinct and intelligence of the, 

 i. 36, 87 ; voice of the, ii. 2W ; castoreum 

 of the. ii. 266. 



Beaters, battles of male, ii. 228. 



BEnisTEiN. on female birds choosing the 

 best .sinirers among tlie males, ii. 49; on 

 rivalry in ,><on'_'--liirds. ii. 50; on the sing- 

 ing of fi-niale liii-ds, ii. 51 ; on birds ac- 

 quiring the .'iongs of other birds, ii. .52 ; 

 on pairing the canary and siskin, ii. 110; 

 on a subvariety of the monk i)igeon, ii. 

 126; on spurred hen.s ii. 154. 



Bedooe, Dr.. on causes of difference in 

 stiiture, i. HI. 



Bee-eater, ii. .53. 



Bkks. i. 70; destruction of drones and 

 queens by, i. 77: pollen -baskets and 

 stings of, i. 149; fernal<>. Mcoiidary sexu- 

 al characters of, i. 246; ditl'erenco" of the 

 sexes in, i. 8&1. 



Beeti-E, himinous larva of a. I. 33.'). 



Beetles, i. 8.55; size of the cerebral gan- 

 glia in. 1. 140; dilatition of the fore tarsi 

 in male. i. 883; blind, i. 856; etridulation 

 of, i. 366. 



Belgium, ancient inhabitants of i. 228. 



Bell, Sir ('., on emotional mu.solcs in man, 

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

 h.ind. i. 136. 



Bell, T., on the numerical porportion of 

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

 ii. 28 ; on the croaking of the frog. ii. 

 25; on the difference in the coloration 

 of the sexes in Zootocti Hripara, ii. 85; 

 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, 11 

 104. 



Bennett, A. W.. on the habits oi Dronux- 

 iix irrordtim. ii. 196. 



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



Bernield tinfcirciicd. colors of ii. 218. 



Bernicle gander pairing with a Canada 

 goose, ii. 109. 



Bettonl K.. on local differences in the 

 nests of It;ilian birds, ii. 16!?. 



Bik^teas, color of the beard in, ii. 804. 



Bhringd. disciform tail-feathers of ii. 86. 



Bihio, se.xual differences in the genus, L 

 388. 



BicnAT, on beauty, ii. 888. 



Bile, colored, in inany animals, i. 814. 



Bl.MANA, i. Is3. 



Birds, imitations of the songs of other 

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

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

 I)leasure o£ in incubation, i. ^76; male, 

 incubation by, i. 2o:i; and n'ptiles. alli- 

 ance ot; i. 2(U; sexual ditl'erences in the 

 beak of some. i. 247 ; migratory, arrival 

 of the male before the female, i. 2.51 ; ap- 

 parent relation between polygamy and 

 marked sexual differences in, i. 261 ; 

 monogamous. Uecominir polygainous un- 

 der domestication, i. 262; e;igerne.ss of 

 male in pursuit of the female, i. 26:}; 

 wild, numerical proportion of the sexes 

 in. i. 297 ; secondary sexual characters 

 of, ii. 36; ditference 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-jiarents. ii. 

 52; brilli.ant, rarely good songsters, ii.. 53; 

 love-antics and dances of; ii. (>5; colora- 

 tion of; ii. 71. et Htqq. ; moulting oC ii. 

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

 ing out of season, ii. 102; mutual afl'ec- 

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

 guish [jersons, ii. 105; hybrid, produc- 

 tion of, ii. 109; Kuropean, number of 

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

 p-adation of secondary sexual charactera 

 in, ii. 129; obscurely colored, building 

 concealed nests, ii. 161 ; young female 



