Neotomodon alstoni Merriam, 1898 . Proc. Biol. Soc. Washington, 12:128.

TYPE LOCALITY: Mexico, Michoacan, Nahuatzin, 8500 ft .

DISTRIBUTION: Cordillera Transvolcanica, Mexico, from WC Michoacan eastwards to C Veracruz.

SYNONYMS: orizabae, perotensis .

COMMENTS: Williams and Ramirez-Pulido's (1984) evaluation of geographic variation disclosed no basis for subspecific divisions. See Williams et al. (1985, Mammalian Species, 242, as Peromyscus alstoni).