The Descent of Man and Selection in Relation to Sex, Vol. II (1st Edition)
i. 361;
on sexes of dragon-flies, i. 361; on the difference of the sexes in the Ichneumonidae, i. 365; on the sexes of _Orsodacna atra_, i. 368; on the variation of the horns of the male _Phanaeus carnifex_,