716 INDEX. 



sexual differences in color of cliromids, 392; on the slight sexual 

 differences of the South Americans, 640; on the tattooing of the 

 Amazonian Indians, 657. 



Age, in relation to the transmission of characters in birds, 528; 

 variation in accordance with, in birds, 551. 



AydcBus pkmuiceus, 255, 472. 



Ayeronitiferonia, noi.se produced by, 343. 



Aynon, dimorphism in, 328, 329. 



Ayrion Ramburii, sexes of, 328. 



Agrionidae, difference in the sexes of, 328. 



A gratis excldmatiords, 358. 



Ague, tertian, dog suffering from, 8. 



Ainos, hairiness of the, 630. 



Aitchison, Mr., on sheep, 279. 



A'ithurus polytmus, young of, 555. 



Albino birds, 476. 



A let i torda, young of, C53. 



A Ices pal in dt f i, 587. 



Alder and Hancock, MM., on the nudi-branch mollusca, 298. 



Allen, J. A., vigor of birds earliest hatched, 240, 241; effect of 

 difference of temperature, light, etc., on birds, 254, colors of birds, 

 480; on the relative size of the sexes of Cdllorhinus vrianvff, 588; on 

 the name of Otni-iii jabnta, 594; on the pairing of seals, 596; on 

 sexual differences in the color of bats, 610; Allen, S., on the habits 

 of Hoploptrrutt, 414: on the plumes of Herons, 444, on the vernal 

 moult of Ihrodins bubulcux, 445. 



Alligator, courtship of the male, 250, 398; roaring of the male, 

 646. 



Amadavat. pugnacity of male, 416- 



Amtidiiui Lathaitd, display of plumage by the male, 456; amadina 

 castnntttU, display of plumage by the male, 455 



Amaxons, butterflies of the, 283; fishes of the, 389. 



America, variation in the skulls of aborigines of, 29; wide range 

 of aborigines of, 193; lice of the natives of, 193; general beardless- 

 ness of the natives of, 639; North, butterflies of, 283; Indians of, 

 women a caiir.e of strife among the. 640; Indians of, their notions of 

 female beauty, 659, 662; South, character of the natives of, 191; 

 population of parts of, 197; piles of stone in, 204; extinction of the 

 fossil horse of, 218, desert birds of, 558; slight sexual difference of 

 the aborigines of, 640; prevalence of infanticide in, 675. 



American languages, often highly artificial, 103. 



Americans, wide geographical range of, 33; native, variability of, 

 198; and negroes, difference of, 224; aversion of, to hair on the face, 

 662. 



Ammophila, on the jaws of, 312. 



Ammotrayii* tmgelap/tns, hairy forelegs of, 606, 609. 



Amphibia, affinity of, to the ganoid fishes, 180; vocal organs of 

 the, 646. 



Amphibians, 187, 394; breeding while immature, 551. 



Amphioxus, 181. 



Amphipoda, males sexually mature while young, 552. 



Amunoph III, negro character of features of, 192, 



Anal appendages of insects, 31& 



