. A treatise on some of the insects injurious to vegetation . Insect pests. 156 ORTHOPTERA. (Fig. 73,) the spotted wingless cricket. Its body is of a pale yellowish-brown color, darker on the back, which is covered ^ ra with little light-colored spots, and the outside of the hindmost thighs is marked with numerous short oblique lines, dis- posed in parallel rows, like those on the thighs of Acheta vittata. It varies in length from one half to more than three quarters of an inch, exclusive of the piercer and legs. The body is smooth and sliining, and the back is arched. Most grasshoppers are of
. A treatise on some of the insects injurious to vegetation . Insect pests. 156 ORTHOPTERA. (Fig. 73,) the spotted wingless cricket. Its body is of a pale yellowish-brown color, darker on the back, which is covered ^ ra with little light-colored spots, and the outside of the hindmost thighs is marked with numerous short oblique lines, dis- posed in parallel rows, like those on the thighs of Acheta vittata. It varies in length from one half to more than three quarters of an inch, exclusive of the piercer and legs. The body is smooth and sliining, and the back is arched. Most grasshoppers are of a green color, and are furnished with wings and wing-covers, the latter frequently resembling the leaves of trees and shrubs, upon which, indeed, many of these insects pass the greater part of their lives. Their leaf- like form and green color evidently seem to have been de- signed for their better concealment. They are nocturnal insects, or at least more active by night than by day. When taken between the fingers, they emit from their mouths a considerable quantity of dark-colored fluid, as do also the locusts or diurnal grasshoppers. They devour the leaves oi plants, and lead a solitary life, or at least do not associate and migrate from place to place in great swarms, like some of the crickets and the locusts. There is a remarkable differ- ence in their habits, which does not appear to have been described hitherto. Some of these grasshoppers live upon grass and other herbaceous or low plants in fields and mead- ows. The piercer of the females is often straight, or only slightly curved. They commit their eggs to the earth, thrust- ing them into holes made therein with the piercer. They lay a large number of eggs at a time, and cover them with a kind of varnish, which, when dry, forms a thin film that com- pletely encloses them. These eggs are elongated, and nearly of an ellipsoidal form. Other green Grylli live upon trees and shrubs. Their wing-covers and wings are broader,
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Keywords: ., bookcentury1800, bookdecade1860, bookpubl, booksubjectinsectpests
