. Elementary biology, animal and human. Biology. 28 ANIMAL BIOLOGY Grasshoppers, too, are admirably provided with organs of locomotion. In fact, they derive their name from the ex- traordinary feats of jumping, which they accomplish largely by their long and muscular hind legs. If a boy could jump twenty times the length of his legs, that is, a distance of 50 feet, he would make an athletic record corresponding to that of the common red-legged locust. For the hind legs of an ordinary specimen of this insect are about 2 inches long, and they frequently leap 4 feet. The wings are also of great a
. Elementary biology, animal and human. Biology. 28 ANIMAL BIOLOGY Grasshoppers, too, are admirably provided with organs of locomotion. In fact, they derive their name from the ex- traordinary feats of jumping, which they accomplish largely by their long and muscular hind legs. If a boy could jump twenty times the length of his legs, that is, a distance of 50 feet, he would make an athletic record corresponding to that of the common red-legged locust. For the hind legs of an ordinary specimen of this insect are about 2 inches long, and they frequently leap 4 feet. The wings are also of great assistance in enabling the animal to secure its food or to escape its enemies. Flight is accomplished by the help of the hind pair only, and when these are not in use, they are folded like a fan beneath the outer pair. 22. Life history of the grasshopper. — The male grass- hopper may be easily distinguished by the rounded tip. of the abdomen; the abdomen of the female, on the other hand, has at its posterior extremity four movable parts which constitute the egg-laying organ or ovi- positpr (Fig. 19). The eggs are pro- duced within the body of the female insect. Before these eggs can develop, however, each must be fertihzed by a sperm-cell produced by the male grasshopper, just as an egg-cell of a plant must be fertihzed by the sperm- nucleus of a pollen grain (P. B., 91). After the process of fertilization has ^llyin!e7j'''^:rv. ^^ken place, the female grasshopper of Agriculture.) (usually in the fall of the year) bur- rows a hole in the ground by alter- nately bringing together, pushing into the earth, and then spreading apart, the four projections that make up the. 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 Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Ma
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