Peromyscus polius Osgood, 1904 . Proc. Biol. Soc. Washington, 17:61.

TYPE LOCALITY: Mexico, Chihuahua, Colonia Garcia .

DISTRIBUTION: WC Chihuahua, Mexico.

COMMENTS: Species-group affiliation enigmatic: initially placed in truei group (Osgood, 1909) but provisionally reassigned to boylii group (Hoffmeister, 1951). Genetic distance data weakly support the latter association (Kilpatrick and Zimmerman, 1975; Schmidly et al., 1985); also see Bradley and Schmidly (1987). P. boylii species group.