INDEX. 721 



of the lien, 418; on tlie object of the song of hirds, 419; on the sing- 

 ing of female birds, 420; on birds acquiring the songs of other 

 birds, 420; on the muscles of the larynx in song birds, 421; on the 

 want of the power of song by female birds, 513. 



Barrow, on the widow-bird, 457. 



Bartels, Dr., supernumerary mamma? in men, 42. 



Bartlett, A. D., period of hatching of bird's eggs, 187; on the 

 tragopan, 249; on the development of the spurs in (Jro&soptilon 

 auritinn, 267; on the fighting of the males of Plectropterux ytnnbeu 

 sis, 414; on the knot, 444; on display in male birds, 447; on tLe dis- 

 play of plumage by the male Polyplcctron, 449 ; on L'I'OMOptUon 

 (turitum and Pkasiatius Wallichii, 454; on the habits of LopJiopharus, 

 477; on the color of the mouth in Baceros biconds, 484; on the incu- 

 bation of the cassowary, 544; on the Cape Buffalo, 5bO; on the use 

 of the horns of antelopes, 580; on the fighting of male wart-hogs, 

 593; on Ammotragus tragelaphus, 606; on the colors of CercopUhecus 

 cephus, 614; on the colors of the faces of monkeys, 629; on the 

 naked surfaces of monkeys, 686. 



Bartlett, on courting of Argus pheasant, 454. 



Bartram, on the courtship of the male allegator, 398. 



Basque language, highly artificial, 102. 



Bate, C. S., on the superior activity of male Crustacea, 250; on the 

 proportions of the sexes in crabs, 288; on the chela? of crustacea, 301; 

 on the relative size of the sexes in crustacea, 302; on the colors of 

 crustacea, 306. 



Bateman, Dr., tendency to imitation in certain diseased states, 82; 

 on Aphasia, 100. 



Bates, H. W., on variations in the form of the head of Amazonian 

 Indians, 32; on the proportion of sexes among Amazonian butter- 

 flies, 283; on sexual differences in the wings of butterflies, 314; on 

 the field-cricket, 321; on Pyrodes pulcherrimus, 333; on the horns of 

 Lamellicorn beetles, 334, 336; on the colors of Epicalice, etc., 350; on 

 the coloration of tropical butterflies, 352: on the variability of Pupilio 

 Sesostris and Childrence, 362; on male and female butterflies inhabit- 

 ing different stations, 364; on mimicry, 366; on the caterpillar of a 

 Sphinx, 369; on the vocal organs of the umbrella-bird, 423; on the 

 toucans, 560; on JBrachyuru* calvus, 629. 



Batokas, knocking out two upper incisors, G56. 



Batrachia, 395; eagerness of male, 250. 



Bats, scent-glands, 604; sexual differences in the color of, CIO; fur 

 of male frugivorous, 610. 



Battle, law of, 163; among beetles, 339; among birds, 408; among 

 mammals, 570 et seq.; in man, 640. 



Beak, sexual difference in the forms of the, 408; in the color of 

 the, 435. 



Beaks, of birds, bright colors of, 559. 



Beard, development of, in man, 63.1; analogy of the, in inan and 

 the quadrumana, 636; variation of the development of the, in dif- 

 ferent races of men, 637; estimation of, among bearded nations 063; 

 probable origin of the, 688; in monkeys, 171; of mammals, 607 



Beautiful, taste for the, in birds, 466; in the quadrumana, 617. 



Beauty, s^nse of, in animals, 104; appreciation of. by birds. 4C9; 

 influence of, 654, 657; variability of the standard of, 681; sense of. 

 sufficiently permanent for action of sexual selection, 563, 712. 



