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Hymonoptera, large size of the cerebral ganglia in; classification of; sexual differences in the wings of; aculeate, relative size of the sexes of. Hymenopteron, parasitic, with a sedentary male. Hyomoschus aquaticus. Hyperythra, proportion of the sexes in. Hypogymna dispar, sexual difference of colour in. Hypopyra, coloration of. Ibex, male, falling on his horns; beard of the.
Woodpecker, selection of a mate by the female. Woodpeckers, tapping of; colours and nidification of the; characters of young. Woolner, Mr., observations on the ear in man. Wormald, Mr., on the coloration of Hypopyra. Wounds, healing of. Wren, young of the. Wright, C.A., on the young of Orocetes and Petrocincla.
Other such cases could be added. If we now turn to the enormous group of moths, which, as I hear from Mr. Stainton, do not habitually expose the under surface of their wings to full view, we find this side very rarely coloured with a brightness greater than, or even equal to, that of the upper side. Some exceptions to the rule, either real or apparent, must be noticed, as the case of Hypopyra.
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