808 



INDEX 



thrash, 535; colors and nidiflcation 

 of the, 586 ; young of the, 629 ; sex- 

 ual difference in coloration of the, 

 634. 



Black-buck, Indian, sexual difEerence 

 in the color of the, 692. 



Blackcap, arrival of the male before the 

 female, 280 ; young of the, 628. 



Black-cock, polygamous, 290; propor- 

 tion of the sexes in the, 326; pug- 

 nacity and love-dance of the, 472; 

 call of the, 486; moulting of the, 

 506; duration of the courtship of 

 the, 523; and pheasant, hybrids 

 of, 535 ; sexual difference in color- 

 ation of the, 634 ; crimson eye-cere 

 of the, 634. 



Blacklock, Dr., on music, 131. 



Black-grouse, characters of young, 600, 

 608. 



Blackwall, J., on the speaking of the 

 magpie, 125; on the desertion of 

 their young by swallows, 147 ; on 

 the superior activity of male spiders, 

 292 ; on the proportion of the sexes 

 in spiders, 337; on sexual variation 

 of color in spiders, 358 ; on male spi- 

 ders, 359. 



Bladder-nose seal, hood of the, 682. 



Blaine, on the affections of dogs, 676. 



Blair, Dr., on the relative liability of 

 Europeans to yellow fever, 267. 



Blake, C. C, on the jaw from La Nau- 

 lette, 63. 



Blakiston, Capt., on the American 

 snipe, 489 ; on the dances of Tetrao 

 phasianellus, 493. 



Blasius, Dr., on the species of Euro- 

 pean birds, 545. 



Bledius taurus, hornlike processes of 

 male, 391. 



Bleeding, tendency to profuse, 312. 



Blenkiron, Mr., on sexual preference 

 in horses, 677. 



Blennies, crest developed on the head 

 of male, during the breeding season, 

 441-442. 



Blethisa multipunctata, stridulation of, 

 396. 



Bloch, on the proportions of the sexes 

 in fishes, 328. 



Blood, arterial, red color of, 346. 



pheasant, number of spurs in, 473. 



Bluebreast, red-throated, sexual differ- 

 ences of the, 609. 



Blumenbach, on Man, 49; on the large 



size ot the nasal cavities in American 

 aborigines, SB; on the position of 

 man, 200 ; on the number of species 

 of man, 232. 

 Blyth, E., on the stracture of the hand 

 in the species of Hylobates, 76; 

 observations on Indian crows, 141 ; 

 on the development of the horns in 

 the Koodoo and Eland antelopes, 808 ; 

 on the pugnacity of the males of Gal- 

 licrex cristata, 468 ; on the presence 

 of spurs in the female Euploeamus 

 erythrophthalmus, 473 ; on the pug- 

 nacity of the amadavat, 47 6 ; on the 

 spoonbill, 485; on the moulting of 

 Anthus, 506; on the moulting of 

 bustards, plovers, and Gallus ban- 

 kiva, 507 ; on the Indian honey- 

 buzzard, 547 ; on sexual differences 

 in the color of the eyes of hornbills, 

 649 ; on Oriolus melanocephalus, 594; 

 on Palseornis javanicus, 595 ; on the 

 genus Ardetta, 595 ; on the peregrine 

 falcon, 595; on young female birds 

 acquiring male characters, 595 ; on 

 the immature plumage of birds, 600; 

 on representative species of birds, 

 604; on the young of Turnix, 614; 

 on Ehynchsea bengalensis, 615; on 

 anomalous young of Lanius rufus 

 and Colymbus glacialis, B22 ; on the 

 sexes and young of the sparrows, 

 623 ; on dimorphism in some herons, 

 625 ; on the aseertainmen t of the sex 

 of nestling bullfinches by pulling 

 out breast-feathers, 624; on orioles 

 breeding in immature plumage, 625; 

 on the sexes and young of Buphus 

 and Anastomus, 627 ; on the young 

 of the blackcap and blackbird, 628; 

 on the young of the stoneohat, 629; 

 on the white plumage of Anastomus, 

 636 ; on the horns of Bovine animals, 

 653 ; on the horns of Antilope bezo- 

 artica, 655 ; on the mode of fighting 

 of Ovis cycloceros, 656 ; on the voice 

 of the Gibbons, 681 ; on the crest of 

 the male wild goat, 686 ; on the col- 

 ors of Portax piota, 691 ; on the 

 colors of Antilope bezoartica, 692; 

 on the color of the Axis deer, 693; 

 on sexual difference of color in Hy- 

 lobates hoolock, 694; on the hog- 

 deer, 705; on the beard and whis- 

 kers iu a monkey becoming white 

 with age, 719. 



