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North American Ecology (US and Canada)Phyciodes selenisis native across Canada, the northern and northeastern United States, and the western intermountain region south to Arizona; there are several isolated populations in the west (Scott 1986). Habitats are moist meadows, moist fields, valley bottoms and streamsides. Host plants are herbaceous and largely restricted to one genus, Aster (Compositae). Eggs are laid on the host plant in clusters of an average of 40 eggs per clutch. Individuals overwinter as third instar larvae. There is one flight each year with the approximate flight time late May-mid July in the more southern parts of their range and late June-early Aug in the far north and high altitudes (Scott 1986). Some sources synonymize this species with P. Morpheus and P. pascoensis (Scott 1986).