Peromyscus sejugis Burt, 1932 . Trans. San Diego Soc. Nat. Hist., 7:171.

TYPE LOCALITY: Mexico, Baja California Sur, Santa Cruz Island, 25°17'N, 110°43'W .

DISTRIBUTION: Santa Cruz and San Diego islands, S Gulf of California, Mexico.

COMMENTS: Highly differentiated morphologically and genetically from mainland P. maniculatus (Avise et al., 1974b, 1979; Burt, 1932), though probably derived from a maniculatus-like ancestor (Lawlor, 1983). P. maniculatus species group.