Taxonomic Notes on Mexican Bats of the Genus Rhogeessa

It is a zoological book. Five skins with skulls of Rhogeëssa, collected by J. R. Alcorn in the states of Sonora and Nayarit of western Mexico, were recently received at the Museum of Natural History of the University of Kansas. Two other specimens of the same genus, collected by Walter W. Dalquest in the state of Veracruz of eastern Mexico, also are in the Museum of Natural History. With the aim of applying names to these bats they were compared with materials in the United States National Museum (including the Biological Surveys collection) where there are approximately the same number of Mexican specimens of Rhogeëssa as are in the Museum of Natural History. The three kinds of Rhogeëssa named from Mexico are as follows: R. parvula from the Tres Marias Islands off the west coast of Nayarit; R. tumida from Mirador, Veracruz, on the eastern slope of the Republic; and R. gracilis from Piaxtla, Puebla, on the southern end of the Mexican Plateau. Of Rhogeëssa gracilis Miller (N. Amer. Fauna, 13:126, October 16, 1897) only three specimens are known; two are from Piaxtla, Puebla, and the third is from the Isthmus of Tehuantepec. Only the specimen from the Isthmus has a complete skull. The broken skull of the holotype is partly separated from the skin of the head and in such a manner as to reveal the teeth.