. The eastern tent caterpillar. Eastern tent caterpillar; Trees. 72 Connecticut Experiment Station Bulletin 378 A colony of tent caterpillars was brought into the laboratory on May 1. The nest had been formed, though the caterpillars were small, measuring about three-sixteenths of an inch in length, and had probably been hatched about a week. On May 26 they were full grown and three or four had pupated. In a week, all had made their cocoons, and by June 10, the adults began to emerge. This continued for nearly a week, until all had come forth. Meantime several egg-clusters had been deposited b
. The eastern tent caterpillar. Eastern tent caterpillar; Trees. 72 Connecticut Experiment Station Bulletin 378 A colony of tent caterpillars was brought into the laboratory on May 1. The nest had been formed, though the caterpillars were small, measuring about three-sixteenths of an inch in length, and had probably been hatched about a week. On May 26 they were full grown and three or four had pupated. In a week, all had made their cocoons, and by June 10, the adults began to emerge. This continued for nearly a week, until all had come forth. Meantime several egg-clusters had been deposited by the females in the breeding cage. DESCRIPTION Egg: The eggs are gray in color and very small, about one-eighteenth of an inch long, and slightly more than half as thick. The upper end is circular, and is a little larger than the lower end. They are placed on end, close together, and covered one-sixteenth of an inch deep with a brown substance resembling glue. The egg-cluster usually encircles the twig, but is sometimes deposited on one side only. Egg-clusters are shown in Figures 5 and Figure 9. Cocoons of tent caterpillar. Natural size. Larva: When first hatched, the caterpillar is very small and nearly black, with a few gray hairs. It molts five or six times as it increases in size, and after each molt the markings show more distinctly. When full grown the caterpillar is from two to two and one-half inches in length and is thinly covered with long, light brown hairs. The color is black with a white stripe along the back, and many short, irregular, brownish stripes, or markings, along the side of each segment. The sides are of a bluish color and each segment bears an oval blue spot nearly surrounded by black. The undersides of the body, head, and legs are black. The larvae, natural size, are shown in Figure 8. Pupa: The pupa stage is passed in a white, oval cocoon, which is about one inch in length and half an inch in thickness. It is made of loosely woven, silken threa
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