Sigmodon alleni Bailey, 1902 . Proc. Biol. Soc. Washington, 15:112.

TYPE LOCALITY: Mexico, Jalisco, Mascota, Mineral San Sebastian .

DISTRIBUTION: W Mexico, from S Sinaloa to S Oaxaca.

SYNONYMS: guerrerensis, macdougalli, macrodon, minor, planifrons, setzeri, vulcani .

COMMENTS: See Shump and Baker (1978a, Mammalian Species, 95).