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Three species of short-tailed bats of the genusCarollin have been recorded from the caves of thisregion. The nomenclature for this genus follows therevision of Pine (1972). Carollin brevicauda (Schinz)is known from caves in Chiapas, Puebla, QuintanaRoo, San Luis Potosi, Tabasco, Tamaulipas, andVeracruz, Mexico; and the Maya Mountains of Belize.Carollin perspicillata azteca Saussure has been foundin caves in Chiapas, Veracruz, and Yucatan, l\lexico;the Maya Mountains of Belize; and El Peten and AltaVerapaz, Guatemala. Carollia subrufa (Hahn) isknown only from caves in Tabasco, Mexico; and AltaVerapaz, Guatemala.The nectar-feeding Mexican long-tongued bat,Choeronycteris mexicana Tschudi, has been found incaves in Mexico from Coahuila and Sonora south toMichoacan. Peters' false vampire bat, Chrotopterusauritus auritus (Peters), has been found in caves inChiapas, Oaxaca, Veracruz, Yucatan, and QuintanaRoo. This is apparently a carnivorous species.Three species of vampire bat occur in Mexico andCentral America, and all are known from caves.Villa R. (1953a) has discussed the systematics of thesubfamily Desmodontinae. Diaemus youngi (Jentink)is a rare species known only from caves by specimenscollected in Grutas del Cocona, Tabasco. The hairyleggedvampire bat, Diphylla ecaudata centralisThomas, has been reported from caves in Chiapas,Oaxaca, Quintana Roo, San Luis Potosi, Tamaulipas,Veracruz, and Yucatan. This species is reported toleave only dry, brown stains beneath its roosts (Halland Dalquest, 1963). The most common vampire bat,and probably the most studied of all Mexican bats, isDesmodus rotundus murinus Wagner. Various aspectsof the behavior of a colony of this species inhabitingCueva de Don Luis, Tabasco, has been studied byWimsatt (1969). Intensive investigations of this specieswere conducted in southern Mexico by the UnitedStates Bureau of Sport Fisheries and Wildlife(1970, 1971). This species is known from caves fromNuevo Leon into Belize and Guatemala. It usuallyroosts in small domes or crevices in the ceiling of thecave in clusters ranging from a few individuals tomore than 100. The presence of this species in a cavecan be immediately determined by pools of black,tarry guano beneath their roosts. These pools harbora distinctive invertebrate fauna, including severalfamilies of fly, and histerid and leiodid beetles.Pallas' long-tongued bat, Glossophaga soricinaleachii (Gray), is among the more frequently encounteredbats in the caves of Mexico, Guatemala,and Belize. This species feeds on nectar and fruit,and roosts deep in caves. It is known from caves fromTamaulipas and Durango south into Guatemala andBelize.Underwood's long-tongued bat, Hylonycteris underwoodiThomas, is a rare species known from cavesin Tabasco and Veracruz. In one cave pits of joboplums were found beneath their roost, indicating theyhad taken the fruit into the caves to eat (Hall andDalquest, 1963). Another species which is seldomcollected from caves is Tornes' long-eared bat, Lonchorhinaaurita aurita Tomes, known only from cavesin Oaxaca, Quintana Roo, and Tabasco. In QuintanaRoo this species was found to roost in clusters ofabout 10 individuals in depressions in the ceiling(Jones et aI., 1973).Two species of long-nosed bat of the genus Leptanycterisare known from caves in Mexico. This genusis known from caves from Texas south into Guerrero.The ranges of the two species are broadly sympatricthroughout most, if not all, of Mexico, and there hasbeen much confusion as to their correct identity.Hoffmeister (1957) and Ramirez-Pulido and Alvarez(1972) have discussed the taxonomy of the genus.Leptonycteris nivalis (Saussure) is known from cavesfrom Tamaulipas into Guerrero. Leptonycteris sanbomiHoffmeister has been taken in caves from Sonoraand Chihuahua south into Chiapas and Guerrero.Both species have been taken from the same caves onseveral occasions. These species are nectar-feeders andmay occur in colonies containing several hundred individuals.The only cave record for the long-legged bat, ,Wacrophyllummacrophyllum Schinz, is that of a cavenear Teapa, Tabasco. This is the northern limit of therange for this species.Two species of the leaf-nosed bats of the genusMacrotus are known from caves in Mexico. The systematicsof these insectivorous bats have been studiedby Anderson and Nelson (1965). Macrotus califomicusBaird is known from caves in Baja California Surand Sonora. Macrotus waterhousii Gray is representedin the caves of Mexico by two subspecies: U. w. bulleriH. Allen from Hidalgo, Jalisco, and Nuevo Leon;and M. w. mexicanus Saussure from Colima, Guerrero,Mexico, and Morelos.Three species of small-eared bats of the genusMicronycteris have been recorded from caves inMexico and Belize. Micronycteris megalotis mexicanaMiller has been found in caves in Guerrero, Morelos,San Luis Potosi, Tabasco, Tamaulipas, and Yucatan.This is apparently an insectivorous species and isusually present in small numbers. Micronycteris sylvestris(Thomas) has been recorded only from cavesin Jalisco and Veracruz. Micronycteris brachyotis(Dobson) has been recorded from caves only fromthe Maya fountains of Belize.254