EN
In March, 2001, four bat species new to the fauna of Myanmar were collected in a limestone karst area of Mon State, south-east Myanmar, namely Craseonycteris thonglongyai, Rhinolophus marshalli, Myotis chinensis, and Myotis horsfieldii. Prior to this, C. thonglongyai was known only from Kanchanaburi Province in western Thailand. The new records increase the number of bat families for Myanmar to ten and the number of species to 92. The distribution pattern of C. thonglongyai in Myanmar and Thailand is discussed.