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On the other hand, in the Tenthredinidae the males are generally darker than the females. In the Siricidae the sexes frequently differ; thus the male of Sirex juvencus is banded with orange, whilst the female is dark purple; but it is difficult to say which sex is the more ornamented. In Tremex columbae the female is much brighter coloured than the male. I am informed by Mr.
Tenthredinidae, proportions of the sexes in; fighting habits of male; difference of the sexes in. Tephrodornis, young of. Terai, in India. Termites, habits of. Terns, white; and black. Terns, seasonal change of plumage in. Terror, common action of, upon the lower animals and man. Testudo elegans. Testudo nigra. Tetrao cupido, battles of; sexual difference in the vocal organs of.
Smith, F., on the Cynipidae and Tenthredinidae; on the relative size of the sexes of Aculeate Hymenoptera; on the difference between the sexes of ants and bees; on the stridulation of Trox sabulosus; on the stridulation of Mononychus pseudacori. Smynthurus luteus, courtship of. Snakes, sexual differences of; mental powers of; male, ardency of. "Snarling muscles."
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