We examined the 3704 specimens of rodents of the genera Habromys, Osgoodomys and Peromyscus, except those from the Mexican State of Tlaxcala. Mostly of them are from localities of the Mexican Transvolcanic Belt. We also include those specimens from marginal or occasional fieldwork in different parts of the country, as well as those given or permanent deposit in the Mammal Collection of UAMI. All of them belong to the following species Habromys lophurus, Osgoodomys banderanus, Peromyscus aztecus, P. beatae, P. bullatus, P. difficilis, P. eremicus, P. furvus, P. gratus, P. guatemalensis, P. hylocetes, P. leucopus, P. levipes, P. maniculatus, P. megalops, P. melanocarpus, P. melanophrys, P. melanotis, P. mexicanus, P. ochraventer, P. perfulvus, P. simulus, P. spicilegus, P. yucatanicus, and P. zarhynchus.
