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North American Ecology (US and Canada)Resident in small area of inland southwestern United States (Scott 1986). Habitats are upper Sonoran zone desert scrub. Known host plants are restricted to a single shrub species, Cowania Mexicana ssp. stansburiana (Rosaceae). Eggs are laid on the host plant flowers singly. Larvae eat flower, buds, and young fruits. Individuals overwinter as pupae. There is one flight each year with the approximate flight time Mar1-April30 in California (April June in higher altitudes), April1-May30 in Utah (Scott 1986).