Forest Tent Caterpillar

Forest Tent Caterpillar (Malacosoma disstria) - The adult moth is light brown with a wingspan of approximately 1¼”. Forewings have one broad or two thin parallel dark brown lines across the center. Mature larvae are about 2¼” long, dark bluish with yellow lines extending along each side of the body, and keyhole or footprint-shaped white spots down the middle of the back. Pupae are reddish-brown and the silk cocoons are commonly formed in loosely rolled leaves. Eggs are laid around the twig in masses of as many as 300, covered with a dark-colored secretion that hardens into a glistening porous cover.



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