Abstract:The Rufous Tree Rat, Diplomys labilis, is known to range geographically from Central Panamá to Colombia and probably Ecuador. It occurs in a variety of habitat types where it moves by the branches in the high canopy at night. We report the Rufous Tree Rat for Costa Rica, ranging outside its geographical distribution about 490 km west from its type locality.

Specimens of the Neotropical dog-faced bats of the genus Cynomops Thomas, 1920 are poorly represented in museum collections, and the geographical distributions of the eight species are not well known. We report voucher specimens that confirm the presence of C. greenhalli Goodwin, 1958 in the Tropical Wet Forest of Costa Rica. These specimens represent an extension of the distribution into the Caribbean Central America.