Baiomys musculus (Merriam, 1892) . Proc. Biol. Soc. Washington, 7:170.

TYPE LOCALITY: Mexico, Colima, Colima .

DISTRIBUTION: S Nayarit and C Veracruz, Mexico, to NW Nicaragua, excluding Yucatan Peninsula and Caribbean tropical lowlands.

SYNONYMS: brunneus, grisescens, handleyi, infernatis, nebulosus, nigrescens, pallidus, pullus .

COMMENTS: See Packard and Montgomery (1978, Mammalian Species, 102).