. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. CHAPTER III A STUDY OF THE GRASSHOPPER As grasshoppers, or locusts, are among our most common animals, one of these may be taken as a representative of the great group of invertebrates, or animals without a backbone. When collecting specimens for this study both winged and wingless, or apparently wingless, individuals may be found. This depends on the fact that when young grasshoppers issue from the eggs they look much like the adults, but are without. FIG. 4.—Three different stages of a locust, Mclanophis femur-m
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. CHAPTER III A STUDY OF THE GRASSHOPPER As grasshoppers, or locusts, are among our most common animals, one of these may be taken as a representative of the great group of invertebrates, or animals without a backbone. When collecting specimens for this study both winged and wingless, or apparently wingless, individuals may be found. This depends on the fact that when young grasshoppers issue from the eggs they look much like the adults, but are without. FIG. 4.—Three different stages of a locust, Mclanophis femur-minim; a, just hatched, without wing-pads; b, a later stage showing wings begin- ning to develop; c, adult, with fully developed wings. wings, and the head and hind legs are often abnormally large. As the insects pass through the successive stages of growth, rudimentary wings appear. These increase in size from time to time until the adult condition is reached. Division of the Body into Regions.—The body is divided into three well-defined regions, the head with its eyes, antenna (feelers) and mouth-parts, the thorax, which bears the two pairs of wings and the three pairs of legs, and the abdomen, which 14. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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