626 



BRB-EATCSR. 



INDEX. 



Bee-eater, 371. 



bees, 99; pollen-baskets and stings 

 of. 63 ; destruction of drones and 

 queens by, 106 ; female, secondary 

 sexual characters ot; 208 ; propor- 

 tion of sexes, 254; difference of 

 the sexes in colour and sexual 

 selection, 2'92. 



BrieUe^ luminous larva of a, 277. 



Beetles, 294; size of the cerebral 

 ganglia in, 54; dilatation of the 

 fore tarsi in male, 275 ; blind, 294 ; 

 stridulation of, 301. 



Belgium, ancient inhabitauts of, 182. 



BeLl, Sir C, on emotional muscles in 

 man, 3; "snarling muscles," 41; 

 on the hand, 51. 



, T., on the numerical proportion 



of the sexes in moles, 247 ; on the 

 newts, 348 ; on the croaking of the 

 frog, 350 ; on the difference in the 

 coloration of the sexes in Zootoca 

 viviparOj 357 ; on moles fighting, 

 500. 



Bell-bird, sexual difference in the 

 colour of the, 389. 



Bell-birds, colours of, 492. 



Belt, Mr., on the nakedness of tropical 

 mankind, 57 ; on a spider-monkey 

 and eagle, 102 ; habits of ants, 147 ; 

 Lampyridfp distasteful to mammals, 

 277 ; mimicry of Leptalides, 325 ; 

 colours of Nicaraguan frogs, 349 ; 

 display of humming-birds, 443 ; on 

 the toucans, 492 ; protective co- 

 louring of skunk, 543, 



Benevolence, manifested by birds, 

 411. 



Bennett, A. W., attachment of mated 

 birds, 411 ; on the habits of 2)>o- 

 mccus irroratus^ 478. 



, Dr., on birds of paradise, 



396. 



Berbers, fertility of creases with 

 other races, 171. 



Bemicla antarctica colours of, 492. 



Bernicle gander pairing with a Canada 

 goose. 414. 



Bert, M., crustaceans distinguish 

 colours, 271, 



Bertillon, M., arrested development 

 and polydactylism, 37. 



Bettonl, E., on local differences in 

 the nests of Italian birds, 456. 



B^vl^i ^M see Bombet. 



Bhoteas, colour of the beard in, 558. 



Bkringa, discifox-m tail-feathers of, 

 392. 



Bianconi, Prof., on structures as ex- 

 plained through mechanical prin- 

 ciples, 24. 



Bibio, sexual differences in the genus, 

 280. 



Bichat, on beauty, 585, 



Bickes, proportion of sexes in man, 

 243. 



Bile, coloured, in many animals, 261, 



Bimana, 149. 



Birds, imitations of the songs of other - 

 birds by, 73; dreaming, 74; killed 

 by telegraph wires, 80 ; language 

 of, 86 ; sense of beauty in, 92 ; 

 pleasure of, in incubation, 105; 

 male, incubation by, 163; and rep- 

 tiles, alliance of, 165; sexual dif- 

 ferences in the beak of some, 208 ; 

 migratory, arrival of the male be- 

 fore the female, 212 ; apparent 

 relation between polygamy and 

 marked sexual differences in, 220; 

 monogamous, becoming polygamous 

 under domestication, 220 ; eager- 

 ness of male in pursuit of the fe- 

 male, 221 ; wild, numerical propor- 

 tion of the sexes in, 247 ; secondary 

 sexual characters of, 358 ; differ- 

 ence of size iu the sexes of, 362; 

 fights of male, witnessed by females, 

 367 ; display of male, to captivate 

 the females, 367 ; close attention 

 of, to the songs of others, 368 ; ac- 

 quiring the song of their foster- 

 parents, 370 ; brilliant, rarely good 

 songsters, 371; love- antics and 

 dances of, 380; coloration of, 385 

 et seq. ; moulting of, 390 et seq, ,- 

 unpaired, 407 ; male, singing out 

 of season, 400; mutual affection of, 

 410 ; in confinement, distinguish 

 persons, 41,1; hybrid, production 

 of, 414; Albino, 419; European, 

 number of species of, 422; varia- 

 bility of, 422 ; geographical distri- 

 bution of colouring, 422 ; gradatioD 

 of secondary sexual characters in, 

 430; obscurely coloured, building 

 concealed nests, 454 ; young female, 

 acquiring male characters, 462 j 

 breedii^g iu immature plumage, 

 484; moulting of, 484; aquatic, 



