. Nature-study; a manual for teachers and students. Nature study. TYPICAL INSECTS 201 manure piles or rich soil. This caterpillar-like larva, with a hard head and chewing mouth-parts, a soft, segmented body, with feet hke a caterpillar, but no prolegs, lives on delicate roots of plants or on decaying organic matter. Most beetle-grubs pass into pupae, the quiescent stage, which is a sort of chrysalis in which the wings are in sep- arate pouches and the legs are free. The June-beetle spins no cocoon, but hollows a cavity in the ground, which it hnes with an excretion that makes a kind of shell a
. Nature-study; a manual for teachers and students. Nature study. TYPICAL INSECTS 201 manure piles or rich soil. This caterpillar-like larva, with a hard head and chewing mouth-parts, a soft, segmented body, with feet hke a caterpillar, but no prolegs, lives on delicate roots of plants or on decaying organic matter. Most beetle-grubs pass into pupae, the quiescent stage, which is a sort of chrysalis in which the wings are in sep- arate pouches and the legs are free. The June-beetle spins no cocoon, but hollows a cavity in the ground, which it hnes with an excretion that makes a kind of shell around it. In the spring and early summer the insects emerge from their pupal. Fig. 62. Caterpillar Beginning to Spin Cocoon, and Finished Cocoon. .4. Old Caterpillar Coat, B. Chrysalis. cases in adult form. They often come in such numbers that they do considerable harm to the foliage of trees. The grubs also of certain kinds of June-beetles do harm in the gardens, by eating the roots of plants. In the daytime the June- beetles hide, sometimes in the foKage of trees, and they come out at night, flying about in a blundering way seeking for their mates. Beetles are well adapted for living under various conditions. There are many varied forms, and they number about 100,000 species. Their stout mouth-parts adapt them to all sorts of food. Many are quite injurious. Meal-worms (beetle larvae) spoil flour and grain. Potato-beetles destroy the foliage of potatoes. Cucumber beetles eat squash, melon, and cucumber vines. Rose-chafers destroy our roses. Wood. 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 Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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