Sigmodon leucotis Bailey, 1902 . Proc. Biol. Soc. Washington, 15:115.

TYPE LOCALITY: Mexico, Zacatecas, Sierra de Valparaiso, 2653 m .

DISTRIBUTION: Interior Mexico, from SW Chihuahua and S Nuevo Leon to C Oaxaca.

SYNONYMS: alticola, amoles .

COMMENTS: See Shump and Baker (1978b, Mammalian Species, 96).