. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. a h c Fig. 13.—Orgyia leucostigma: a, female on cocoon ; b, larva ; c, female pupa ; d, male pnpa. or spittle like matter. In one of these egg-masses which we received from Kansas we have counted as manj^ as 780 eggs, while from another mass we obtained upward of 400 young caterpillars. Development and Characters of the Larva.—In the latitude of Saint Louis, Mo., and Washington the eggs begin to hatch about the middle of May, and the newly-born caterpillar, not quite 3 millimeters in length, is of dull whitish-gr
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. a h c Fig. 13.—Orgyia leucostigma: a, female on cocoon ; b, larva ; c, female pupa ; d, male pnpa. or spittle like matter. In one of these egg-masses which we received from Kansas we have counted as manj^ as 780 eggs, while from another mass we obtained upward of 400 young caterpillars. Development and Characters of the Larva.—In the latitude of Saint Louis, Mo., and Washington the eggs begin to hatch about the middle of May, and the newly-born caterpillar, not quite 3 millimeters in length, is of dull whitish-gray color, with the under side paler, the upper side being covered with rather long hairs and tufts of a dark-brown color. In two days from hatching small orange spots begin to appear along. Fig. 14.—Orgyia leucostigina: female caterpillar. the back, and on the seventh day the first molt takes place, to be fol- lowed at intervals of six days each by the second and third molts. The changes that take place during this time in the appearance of the caterpillar are remarkable, and after the third molt it is a beautiful ob-. 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 United States. Bureau of Entomology. Washington : G. P. O.
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