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North American Ecology (US and Canada)Resident in deserts of Western North America, with range extending just barely into British Columbia. (Scott 1986). Habitats are DESERT MOUNTAINS AND CANYONS TO PONDEROSA PINE FORESTS. Host plants include many species, but mostly in one family, UMBELLIFERAE. Hosts are usually herbaceous. Eggs are laid on the host plant singly. Individuals overwinter as pupae. There are a variable number of flights based on latitude each year with the approximate flight time MAY1-JUN30 in the northern part of the range and MAR1-AUG30 in the southern part of their range (Scott 1986).