Produced by Chris Curnow, Joseph Cooper and the Online Distributed Proofreading Team at https://www.pgdp.net UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Volume 14, No. 5, pp. 73-98, 4 figs. December 29, 1961 North American Yellow Bats, "Dasypterus," And a List of the Named Kinds Of the Genus Lasiurus Gray By E. RAYMOND HALL AND J. KNOX JONES, JR. UNIVERSITY OF KANSAS LAWRENCE 1961 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, Henry S. Fitch, Theodore H. Eaton, Jr. Volume 14, No. 5, pp. 73-98, 4 figs. Published December 29, 1961 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY JEAN M. NEIBARGER, STATE PRINTER TOPEKA, KANSAS 1961 North American Yellow Bats, "Dasypterus," And a List of the Named Kinds Of the Genus Lasiurus Gray BY E. RAYMOND HALL AND J. KNOX JONES, JR. INTRODUCTION Yellow bats occur only in the New World and by most recent authors have been referred to the genus _Dasypterus_ Peters. The red bats and the hoary bat, all belonging to the genus _Lasiurus_ Gray, also occur only in the New World except that the hoary bat has an endemic subspecies in the Hawaiian Islands. The kind of yellow bat first to be given a distinctive name was the smaller of the two species that occur in North America. It was named _Nycticejus ega_ in 1856 (p. 73) by Gervais on the basis of material from the state of Amazonas, Brazil, South America, but was early recognized as occurring also in North America (in the sense that Mexico and Central America, including Panama, are parts of North America). More than 40 years elapsed before subspecific names were proposed for the North American populations; Thomas named _Dasypterus ega xanthinus_ in 1897 (p. 544) from Baja California, and _Dasypterus ega panamensis_ in 1901 (p. 246) from Panama. The larger of the two North American species was named _Lasiurus intermedius_ in 1862 (p. 246) by H. Allen on the basis of material from extreme northeastern Mexico. Another alleged species, _Dasypterus floridanus_, was named in 1902 (p. 392) by Miller from Florida, but as set forth below it is only a subspecies of _L. intermedius_, a species that is seemingly limited to parts of the North American mainland and Cuba. A third species, _Atalapha egregia_, allegedly allied to the small yellow bat, _L. ega_, was named in 1871 (p. 912) by Peters from Santa Catarina, Brazil, but Handley (1960:473) thinks that _L. egregius_ is allied instead to the red bats. The species _L. egregius_ has not been studied in connection with the observations reported below.