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North American Ecology (US and Canada)Polites rhesus is a year-round resident in states just east of the Rockies, from southern Saskatchewan to New Mexico, and a small separate population in Mexico (Scott 1986). Habitats are shortgrass and mixed grass prairie. Host plant is the grass Bouteloua gracilis. Eggs are laid on the host plant singly. There is one flight each year with the approximate flight time mostly May 1-May 31 (late May- June 15 at high altitude) (Scott 1986). Some sources synonymize this species with Yvretta rhesus.