Peromyscus interparietalis Burt, 1932 . Trans. San Diego Soc. Nat. Hist., 7:175.

TYPE LOCALITY: Mexico, Baja California Norte, San Lorenzo Sur Island, 28°36'N, 112°51'W .

DISTRIBUTION: North and South San Lorenzo Islands, and Salsipuedes Island, N Gulf of California, Mexico.

SYNONYMS: lorenzi, ryckmani.

COMMENTS: Considered distinct from P. guardia by Banks (1967); also see Avise et al. (19746), Brand and Ryckman (1969), and Lawlor (19716). P. eremicus species group.