This paper reports the first record of the bats Enchisthenes hartii and Natalus stramineus in the state of Hidalgo and of the rodent Nyctomys sumichrasti in the state of Guerrero, Mexico. These records increase the known range of these species. External and cranial measurements and reproductive condition of the specimens are reported. We also include the habitat where they were captured and the presence therein of other small mammals.