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North American Ecology (US and Canada)Resident in eastern North America (Scott 1986). Habitats are IN OR NEAR OPEN WOODS. Host plants are usually herbaceous and include many species, but mostly in one family, CRUCIFERAE. Eggs are laid on the host plant singly. Individuals overwinter as pupae. There is one flight each year with the approximate flight time MAR1-MAY31 depending on latitude (Scott 1986).