ii. 180;

on the immature plumage of thrushes, ii. 185; on the immature plumage of birds, ii. 186 _et seq._; on birds breeding in immature plumage, ii. 214; on the growth of the crest and plumes in the male _Ardea ludoviciana_, ii. 216; on the change of colour in some species of _Ardea_, ii. 231; on the speculum of _Mergus cucullatus_, ii. 291; on the musk-rat, ii. 298.

AUDUBON and Bachman, MM., on squirrels fighting, ii. 239; on the Canadian lynx, ii. 267.

AUSTEN, N. L., on _Anolis cristatellus_, ii. 32, 33.

AUSTRALIA, half-castes killed by the natives of, i. 220; lice of the natives of, i. 220; not the birthplace of man, i. 199; prevalence of female infanticide in, ii. 364.

AUSTRALIA, South, variation in the skulls of aborigines of, i. 108.

AUSTRALIANS, colour of newborn children of, ii. 318; relative height of the sexes of, ii. 320; women a cause of war among the, ii. 323.

AXIS deer, sexual difference in the colour of the, ii. 290.

AYMARAS, measurements of the, i. 119; no grey hair among the, ii. 320; hairlessness of the face in the, ii. 322; long hair of the, ii. 348.

AZARA, on the proportion of men and women among the Guaranys,