Reithrodontomys chrysopsis Merriam, 1900 . Proc. Biol. Soc. Washington, 13:152.

TYPE LOCALITY: Mexico, Mexico, Volcan Popocatepetl, 11,500 ft .

DISTRIBUTION: Transverse Volcanic Range, SE Jalisco to WC Veracruz, Mexico.

SYNONYMS: colimae, orizabae, perotensis, tolucae.

COMMENTS: Subgenus Reithrodontomys, megalotis species group.