. Elementary entomology . \ \ / / / \ \ ^ with a well-developed head bearing biting mouth-parts and small ocelli on either side. The thorax bears three pairs of jointed legs, which terminate in a single claw, and the back of the prothorax forms a hard shield, thepronotum. Theab- dominal segments are very similar and bear frohi one to five pairs of short, fleshy, unseg- mented false legs, or prolegs, which termi- nate in a circle of small hooks, one pair of which is always borne by the anal segment. The caterpillars of many moths pupate in little cells, which they hollow out in the ground, but
. Elementary entomology . \ \ / / / \ \ ^ with a well-developed head bearing biting mouth-parts and small ocelli on either side. The thorax bears three pairs of jointed legs, which terminate in a single claw, and the back of the prothorax forms a hard shield, thepronotum. Theab- dominal segments are very similar and bear frohi one to five pairs of short, fleshy, unseg- mented false legs, or prolegs, which termi- nate in a circle of small hooks, one pair of which is always borne by the anal segment. The caterpillars of many moths pupate in little cells, which they hollow out in the ground, but most of them spin silken co- coons, within which they pupate. Some are thin, flimsy affairs, while others, like those of the silkworm, contain a large amount of silk and are very firmly built, forming a warm home for the hibernating pupse. Butterfly larvae spin no co- coons, and the pupa?, or chrysalids, hang pendent from the food plant or some near-by object, to which they are lashed by a strand of silk around the body. The order is one of the largest, including over sixty-six hundred spe- cies in this country, and contains many of our most serious pests, while very few of its members are beneficial. The families are largely distinguished by the wing venation, which is difficult to see, so that it is exceedingly hard to arrange them in any natural and easily f"iG. 258. Luna moth, showing pectinate, or feath ered, form of moth antennae (After S. J. Hunter)
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
