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North American Ecology (US and Canada)Chlosyne harrisii is a resident of the northeastern United States and southeastern Canada (Scott 1986). Habitats are transition to lower Canadian zone moist meadows, marsh edges, and forest openings. Host plants are herbaceous, restricted to a few species in family Compositae, the main hostplant is Aster umbellatus. Eggs are laid on the host plant in clusters averaging 200 eggs. Individuals overwinter as third and fourth instar larvae. There is one flight each year with the approximate flight time June 15-July 15 (Scott 1986).