The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . ^ oflepidopterous insects so entirely depends, are easily detachedin the form of a fine dust, which, when examined with the. Featlier-scales from the Goat-moth. microscope, are exceedingly variable in their form, but gene-rally more or less wedge-shaped, or oval; sometimes toothed,or notched, at the broadest end, some having a slender foot-stalk. The membranous surface of the wing itself exhibitsthe appearance, when similarly examin
The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . ^ oflepidopterous insects so entirely depends, are easily detachedin the form of a fine dust, which, when examined with the. Featlier-scales from the Goat-moth. microscope, are exceedingly variable in their form, but gene-rally more or less wedge-shaped, or oval; sometimes toothed,or notched, at the broadest end, some having a slender foot-stalk. The membranous surface of the wing itself exhibitsthe appearance, when similarly examined, of numerousminute impressions arranged in lines, in which the base ofthe scales are planted, being laid upon each other like thetiles on the roof of a house. The derivation of the name ofthe order,Le7JzWo/?^era (scaly wings), expresses this has been suggested, that the form of these scales might beserviceably employed in furnishing specific characters, forthe determination of the various species of lepidopterousinsects; but this is quite impossible, since scales of everypossible form are found upon a single individual, as may beseen from the preceding figures, all of which represent scalesfrom the goat-moth. Here it will be serviceable to notice a few of the more
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Keywords: ., bookau, bookcentury1800, booksubjectcrustacea, booksubjectinsects
