The species' range extends from southeastern Washington and southern Idaho south through Oregon, eastern California, Nevada, Utah, western Colorado, Arizona, New Mexico, western and central Texas, in the United Sates, to Chihuahua, western Coahuila, Durango, and Zacatecas to northeastern Jalisco in Mexico; the eastern and southern range limits in Mexico are poorly understood (Camper and Dixon 1994). The elevational range extends to 3,077 m asl in Inyo County, California (Stumpel 1995).