ii. 104;

on the bullfinch and starling, ii. 105; on the cause of birds remaining unpaired, ii. 107; on starlings and parrots living in triplets, ii. 107; on recognition of colour by birds, ii. 110; on hybrid birds, ii. 113; on the selection of a greenfinch by a female canary, ii. 115; on a case of rivalry of female bullfinches, ii. 121; on the maturity of the Golden pheasant, ii. 213.

WEISBACH, Dr., measurement of men of different races, i. 216; on the greater variability of men than of women, i. 275; on the relative proportions of the body in the sexes of different races of man, ii. 320.

WELCKER, M., on Brachycephaly and Dolichocephaly, i. 148; on sexual differences in the skull in man, ii. 317.

WELLS, Dr., on the immunity of coloured races from certain poisons, i. 243.

WESTRING, on the stridulation of _Reduvius personatus_, i. 350; on the stridulating organs of the Coleoptera, i. 382; on sounds produced by _Cychrus_, i. 382; on the stridulation of males of _Theridion_, i. 339; on the stridulation of beetles, i. 379; on the stridulation of _Omaloplia brunnea_, i. 381.

WESTPHALIA, greater proportion of female illegitimate children in, i. 301.

WESTROPP, H. M., on the prevalence of certain forms of ornamentation, i. 233.

WESTWOOD, J. O., on the classification of the Hymenoptera, i. 188; on the Culicidae and Tabanidae, i. 254; on a Hymenopterous parasite with a sedentary male, i. 272; on the proportions of the sexes in _Lucanus cervus_ and _Siagonium_,