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North American Ecology (US and Canada)Resident in large area of western North America, north to Alaska and across Canada (Scott 1986). Habitats are moist meadows and streamsides from the high transition zone prairie to the alpine zone and edge of the tundra. Host plants are usually herbaceous Leguminosae, with most known hosts from genus Trifolium. Eggs are laid on the host plant singly. Larvae eat flowers. Individuals overwinter as half-grown larvae. There is one flight each year with the approximate flight time late May-early July in low altitudes, late June-Aug 15 in high altitudes and northward (Scott 1986).