. Elements of comparative zoology. Zoology. INSECTS. 243 Order I.—Thysanura. These are small wingless insects without any general common name except those of ' bristle- tails' and ' springtails,' which have been manufactured for them. The springtails live in damp places—in cellars, under leaves in the forest, etc., and they have a spring beneath the body by means of which they can jump to great distances. The bristletails have the body terminating in two long filaments. To this last group belong some pests known commonly as ' silverfish'—soft-bodied shining forms, which eat paper, starched clo
. Elements of comparative zoology. Zoology. INSECTS. 243 Order I.—Thysanura. These are small wingless insects without any general common name except those of ' bristle- tails' and ' springtails,' which have been manufactured for them. The springtails live in damp places—in cellars, under leaves in the forest, etc., and they have a spring beneath the body by means of which they can jump to great distances. The bristletails have the body terminating in two long filaments. To this last group belong some pests known commonly as ' silverfish'—soft-bodied shining forms, which eat paper, starched clothing, etc. Aside from this silverfish or 'fish-moth' the group has little general interest; but to the naturalist it is very interesting because it is so Fig. 68. — 'Silver- fish' {Lepisma saccharina). Order II.—Orthoptera. The name Orthoptera, which is given to the group containing the grasshoppers, crickets, locusts, cockroaches, etc., means straight-winged, and alludes to the general course of the veins of the wings of most forms. This is, however, not a feature of great importance, for indeed we find species which are absolutely lacking in wings, but which are, in other respects, so closely related to the grasshoppers that they too must be included in the Orthop- tera. When we take all of these Orthopterous forms we see that they agree in a number of points, some of which may be mentioned. The jaws are strong and fitted for biting hard substances; the antennae are usually long and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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