. A textbook in general zoology. Zoology. OTHER MEMBERS OF THE CLASS — INSECTA 187 hranous wings that are covered, when at rest, by a pair of hard, horny wing covers, called the elytra. The metamorphosis is complete and the mouth parts are formed for biting. The beetles differ from other insects in having this pair of hard, horny wing covers (Fig. 132). They may be told almost surely by this character alone. The front wings of the grasshoppers and crickets are somewhat similar but thinner. The Colorado potato beetle is a familiar ex- ample (Fig. 133). It is a yellow-lined beetle IT •, 11. 1 Fi
. A textbook in general zoology. Zoology. OTHER MEMBERS OF THE CLASS — INSECTA 187 hranous wings that are covered, when at rest, by a pair of hard, horny wing covers, called the elytra. The metamorphosis is complete and the mouth parts are formed for biting. The beetles differ from other insects in having this pair of hard, horny wing covers (Fig. 132). They may be told almost surely by this character alone. The front wings of the grasshoppers and crickets are somewhat similar but thinner. The Colorado potato beetle is a familiar ex- ample (Fig. 133). It is a yellow-lined beetle IT •, 11. 1 Fig. 130. — Common mosquito, enlarged. eggs close together in a bunch, usually on the under sides of the leaves of potatoes. The soft red larvte soon appear and immediately begin to eat the leaves. The larvse keep on eating and growing for two or three weeks and then go into the ground to pupate. The May beetles are abundant in spring, flying in through the windows and bumping about the room. Their Fig. 131. — Horsefly. j. c j eggs are laid at the roots oi grass, and the white grubs live in the soil, eating off the grass roots. The larva lives in the ground two or three years and changes to a pupa in an earthen cell from which the adult emerges in the spring of 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 Herrick, Glenn W. (Glenn Washington), 1870-1965. New York, Cincinnati [etc. ] American Book Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
