Body is yellowish green to dull green; there is a black stripe along the sides.
Development. Eggs are laid at the base of trees; hatching is in two weeks. Early-stage larvae climb the tree trunk and feed on the underside of the leaves. Full-grown larvae crawl down the trunk to pupate in the bark near the ground or the soil around the tree. Larval development takes two to three weeks; there usually are two generations per year. Second-generation adults select hibernation sites in fall.
Habits. Overwintering locations are leaf litter around the foundations of buildings, and in the attics, eaves, and interior rooms of houses. Adults usually remain active during winter but do not feed.