. Elements of comparative zoology. Zoology. INSECTS. 265 other common name, hawk-moths, has reference to their powers of flight. Another group of moths are known as Bombycids. While some of these are unmitigated pests, others are of value to man, the silkworms leading in this respect. These are, in fact, the most valuable of all insects. The true silkworm is a native of China, but has been distributed to all of the warm parts of the earth. Like other caterpil-. Fig. 83.—Sphinx-moth (Everyx myron). From Riley. lars, they form their cocoons, and then these are heated to kill the pupa and the sil
. Elements of comparative zoology. Zoology. INSECTS. 265 other common name, hawk-moths, has reference to their powers of flight. Another group of moths are known as Bombycids. While some of these are unmitigated pests, others are of value to man, the silkworms leading in this respect. These are, in fact, the most valuable of all insects. The true silkworm is a native of China, but has been distributed to all of the warm parts of the earth. Like other caterpil-. Fig. 83.—Sphinx-moth (Everyx myron). From Riley. lars, they form their cocoons, and then these are heated to kill the pupa and the silk of the cocoon is unwound, and after proper treatment becomes the silk of commerce. We have several species of silkworms in this country some of which make a stronger silk than the Chinese species; but although a few articles have been made from it, it has no economic importance. These large American silkworm-moths are known as Polyphemus-, Prometheus-, Cecropia-, and Io-moths, and they, together with the beautiful green Luna-moth, are great favorites with collectors. The skippers are a group of small butterflies in which the clubbed antennae are bent into a hook at the tip. They are called skippers on account of their jerky 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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