620 



INDEX. 



Beautiful, taste for the, in birds, 



405; in the quadrumana, 535. 

 Beauty, sense of, in animals, 89; 

 appreciation of, by birds, 408; 

 influence of, 568, 570; variability 

 of the standard of, 591. 

 Beavan, Lieut., on the develop- 

 ment of the horns in Cervus 

 Bldi, 229. 

 Beaver, instinct and intelligence 

 of the, 65, 66; voice of the, 523; 

 castoreum of the, 524. 

 Beavers, battles of male, 496. 

 Bechstein, on female birds choos- 

 ing the best singers among the 

 males, 364; on rivalry in song- 

 birds, 364; on the singing of fe- 

 male birds, 365; on birds acquir- 

 ing the songs of other birds, 366; 

 on pairing the canary and siskin, 

 410; on a subvariety of the monk 

 pigeon, 421; on spurred hens, 443. 

 Beddoe, Dr., on causes of differ- 

 ence in stature, 30. 

 Bee-eater, 366. 



Bees, 96; pollen-baskets and stings 

 of, 60; destruction of drones and 

 queens by, 102; female, secondary 

 sexual characters of, 204; pro- 

 portion of sexes, 250; difference 

 of the sexes in color and sexual 

 selection, 289. 

 Beetle, luminous larva of a, 275. 

 Beetles, 291; size of the cerebral 

 ganglia in, 62; dilatation of the 

 fore tarsi in male, 273; blind, 291; 

 stridulation of, 298. 

 Belgium, ancient inhabitants of, 



177. 

 Bell, Sir C, on emotional muscles 

 in man, 3; "snarling muscles," 

 39; on the hand, 49. 

 , T., on the numerical pro- 

 portion of the sexes in moles, 

 242; on the newts, 344; on the 

 croaking of the frog, 346; on the 

 difference in the coloration of 

 the sexes in Zootoca vivlpara, 

 S53; on moles fighting, 496. 

 Bell-bird, sexual difference in the 



color of the, 384. 

 Bell-birds, colors of, 488. 

 Belt, Mr., on the nakedness of 

 tropical mankind, 55; on a 

 spider-monkey and eagle, 98; 

 habits of ants, 143; Lampyridse 

 distasteful to mammals, 275; 

 mimicry of Leptalides, 321; col- 

 ors of Nloaraguan frogs, 345; 

 display of humming-birds, 437; 

 on the toucans, 487; protective 

 coloring of skunk, 538. 

 Benevolence, manifested by birds, 



406. 

 Bennett, A. W., attachment of 

 mated birds, 405; on the habits 

 of Dromoeus irroratus, 473. 



, Dr., on birds of paradise, 



390. 



Berbers, fertility of crosses with 

 other races, 167. 



Bernicla antarotiea, colors of, 488. 



Bernicle gander pairing with a 

 Canada goose, 409. 



Bert, M., crustaceans distinguish 

 colors, 267. 



Bertillon, M., arrested develop- 

 ment and polydactylism, 35. 



Bettoni, B., on local differences in 

 the nests of Italian birds, 450 



Bevle, M., see Bombet. 



Bhoteas, color of the beard in 

 553. 



Bhringa, disciform tail-feathers 

 of, 387. 



Bianconi, Prof., on structures as 

 explained through mechanical 

 principles, 23. 



Bibio, sexual differences in the 

 genus, 277. 



Bichat, on beauty, 579. 



Bickes, proportion of sexes in 

 man, 237. 



Bile, colored, in many animals, 

 258. 



Blmana, 145. 



Birds, imitations of the songs of 

 other birds by, 71; dreaming, 72; 

 killed by telegraph wires, 78; 

 language of, 83; sense of beauty 

 in, 89; pleasure of, in incubation, 

 101; male, incubation by, 158; and 

 reptiles, aUiance of, 160; sexual 

 differences in the beak of some, 

 204; migratory, arrival of the 

 male before the female, 208; ap- 

 parent relation between polyg- 

 amy and marked sexual differ- 

 ences in, 215; monogamous, be- 

 coming polygamous under do- 

 mestication, 215; eagerness of 

 male in pursuit of the female, 

 216; wild, numerical proportion 

 of the sexes in, 242; secondary 

 sexual characters of, 355; differ- 

 ence of size in the sexes of, 358; 

 fights of male, witnessed by fe- 

 males, 362; display of male, to 

 captivate the females, 363; close 

 attention of, to the songs of oth- 

 ers, 364; acquiring the song of 

 their foster-parents, 366; bril- 

 liant, rarely good songsters, 366; 

 love-antics and dances of, 375; 

 coloration of, 380 et seq. ; 

 moulting of, 390 et seq.; un- 

 paired, 401; male, singing out of 

 season, 404; mutual affection of, 

 405; in confinement, distinguish 

 persons, 405; hybrid, production 

 of, 408; Albino, 413: European, 

 number of species of, 416; varia- 

 bility of, 416; geographical dis- 

 tribution of coloring, 416; grada- 

 tion of secondary sexual char- 

 acters in, 424; obscurely colored, 

 building concealed nests, 448; 

 young female acquiring male 

 characters, 455; breeding in im- 



