. A treatise on some of the insects injurious to vegetation . Insect pests. 406 LEPIDOPTERA. have their regular times for eating and for rest, and when they have finished their meals, they cluster closely together along the twigs and branches. If disturbed, they raise the ' fore part of their bodies, and shake their heads to signify their displeasure. When fully grown they measure about two inches in length. Commonly in the early part of Sep- tember, they crawl down the trees and go into the ground, to the depth of four or five inches, where they are changed F. lg9 to chrysalids (Fig. 199). Th
. A treatise on some of the insects injurious to vegetation . Insect pests. 406 LEPIDOPTERA. have their regular times for eating and for rest, and when they have finished their meals, they cluster closely together along the twigs and branches. If disturbed, they raise the ' fore part of their bodies, and shake their heads to signify their displeasure. When fully grown they measure about two inches in length. Commonly in the early part of Sep- tember, they crawl down the trees and go into the ground, to the depth of four or five inches, where they are changed F. lg9 to chrysalids (Fig. 199). These re- semble the chrysalids of the imperial Dryocampa, but are much smaller, and like them they remain in the ground throughout the winter, and work their way up to the sur- face in the following summer. These chrysalids may often be seen sticking half-way out of the ground under oak-trees in the latter part of June and the beginning of July, at which time the moths burst them open and make their escape. Dry- ocampa senatoria (Fig. 200), the senatorial Dryo- campa, which is the name of this kind of moth, is of an ochre-yellow color; the wings are faintly tinged with purplish red, especially on the front and hind margins, and are crossed by a narrow purple-brown band behind the middle; the fore wings are sprinkled with blackish dots, and have a small round white spot near the middle. The male is much smaller than the female, its wings are thinner, and more tinged with dull purple-red. It expands about an inch and three quarters; the female, two inches and a half, or more. Three more kinds of Dryocampa are found in Massachu- setts, but they are all rare in this State. The largest of. 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 Harris, Thaddeus William, 1795-1856; Flint, Charles Louis, 1824-1889. Boston :
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