1904.] Allen, New Bats from Tropical America. 235 



with corresponding differences in other measurements. It 

 differs much less from panaiuciisis, but it apparently may well 

 be recognized as a large Andean form of the hastatiis group. 



NOTE ON MEXICAN SPECIES OF OTOPTERUS. 



In 1860 Saussure described a bat as Macrotus mcxicanns, 

 from an alcoholic specimen in poor condition collected at 

 Yautepec, State of Morelos, Mexico. In 1890 Dr. Harrison 

 Allen described Macrotus bulleri from slightly immature 

 specimens taken at Bolaiios, State of Jalisco, Mexico, and 

 subsequently (Bats of N. America, 2d ed., 1894, pp. 41-43, 

 gave a further account of it, based on additional material. 

 These specimens I had previously referred provisionally (this 

 Bulletin, II, 1889, p. 166) to M. calif or nicus, and Dr. H. 

 Allen made his comparisons with this species, making no 

 reference to M. mexicanus Saussure. 



In 1898 Dr. Merriam (Proc. Biol. Soc. Washington, xn, 1898, 

 p. 1 8) compared topotypes of M. mexicanus with topotypes of 

 M. bulleri and stated that he was "unable to find any charac- 

 ters on which the latter form can stand." I had previously 

 recognized both M. mexicanus and M. bulleri as distinct 

 species, and gave (this Bulletin, III, 1891, pp. 179-181) in 

 considerable detail the differences that constitute them 

 strongly marked forms; but I took for M. mexicanus a series 

 of specimens from Tehuantepec City, State of Oaxaca, and 

 compared them with series from Guadalajara and Bolaiios, 

 State of Jalisco. On recently going over the same material 

 again, the two forms still seemed to me unquestionably spe- 

 cifically distinct. I thereupon asked Dr. Merriam to kindly 

 loan me for examination topotypes of Saussure's M. mexi- 

 canus. These are now before me and confirm Dr. Merriam's 

 statement that M. bnllcri and M. mexicanus are identical, 

 M. bulleri being a synonym of M. mexicanus. Otopterus 

 mexicanus is therefore the small dark form, ranging from the 

 State of Morelos westward to the Pacific coast and the Tres 

 Marias Islands, so that a new name must be sought for the 

 large light form occurring at Tehuantepec. This seems to be 



