\f^^O(alS Vol. 80, pp. 207-210 1 December 1967 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON A NEW SUBSPECIES OF THE FREE-TAILED BAT, MOLOSSOPS GREENHALLI, FROM WESTERN MEXICO (MAMMALIA; CHIROPTERA) By J. Knox Jones, Jr., and Hugh H. Genoways Museum of Natural History, The University of Kansas, Lawrence, Kansas 66044 In June of 1964, field parties from the Museum of Natural History, The University of Kansas, collected two specimens of a unique free-tailed bat in Mexico, one in the state of Guerrero and the other in Oaxaca. These proved to be the first specimens of Molossops greenhalli ( Goodwin, 1958 ) taken outside of Trinidad and the first bats of the genus to be reported from north of Panama (Jones and Dunnigan, 1965: 462). Subsequently, Percy L. Clifton obtained, in the state of Jalisco, three more individuals of M. greenhalli, including the first male from the North American mainland. Comparison with material from Trinidad indicates that the Mexican bats represent a distinctive subspecies, which is named and described below. Molossops greenhalli mexicanus new subspecies Holotype: Adult male, skin and skuU, no. 108,609 Museum of Natural History, The University of Kansas; from 7.5 mi. SE Tecomate, 1500 ft, Jalisco; obtained on 7 December 1966 by Percy L. Clifton, original no. 11,998. Geographic distribution: Known only from western Mexico (states of Guerrero, Jalisco, and Oaxaca); known altitudinal range, 1500 ft in Jalisco up to 4800 ft in Oaxaca. Description: Size large, both externally and cranially (see measure-ments and Table 1); braincase high and well inflated; rostrum slightly deflected downward in lateral view; teeth robust; relatively large space between upper incisor and canine, smaller (but clearly evident) space between canine and upper premolar; dorsal color varying from dark brown to reddish brown, contrasting httle with ears and membranes; venter paler than dorsum. 32— Proc. Biol. Soc. Wash., Vol. 80, 1967 (207)
BioStor
