. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 384 AN ECONOMIC ENTOMOLOGY. Most of these parasites have the disadvantage of not influ- encing in the least the amount of injury done by the host; they simply prevent it from changing to an adult. It often happens that spinning caterpillars even complete their cocoon, and in this we find the mass of parasitic cocoons instead of the Lepidopter- ous pupa. On the other hand, some of them complete their P'iG. Apanteles species.—Little mass of cocoons on
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 384 AN ECONOMIC ENTOMOLOGY. Most of these parasites have the disadvantage of not influ- encing in the least the amount of injury done by the host; they simply prevent it from changing to an adult. It often happens that spinning caterpillars even complete their cocoon, and in this we find the mass of parasitic cocoons instead of the Lepidopter- ous pupa. On the other hand, some of them complete their P'iG. Apanteles species.—Little mass of cocoons on leaf, replacing an infested larva; a single cocoon below, from which adult has issued ; much enlarged. development and kill the caterpillar before it is much more than half-grown. Many of these cocoon-forming species belong to the genus Micro^aster, and they are typical of a very large series in the family. The plant-lice-infesting forms frequently belong to the genus Aphidms. As in the previous family, many of these insects have an external ovipositor. While the preceding series of parasites contain a very fair pro- portion of large species, the next family, Chalcididce, contains. 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 Smith, John Bernhard, 1858-1912. Philadelphia and London : J. B. Lippincott co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
