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North American Ecology (US and Canada)Apodemia palmeri is a year-round resident in the southwestern United States, and ranges south to central Mexico (Scott 1986). Habitats are mesquite desert. Host plants are trees, restricted to several species of genus Prosopis (Leguminosae). Eggs are laid on the host plant singly. Individuals overwinter as third instar larvae. There are multiple flights each year with the approximate flight times April1-Nov.30 in the southern part of their range, and two flights between May1-Sept30 in the northern part of the range (Nev. and Utah.) (Scott 1986).