Allen—A New But from Mexico. 
Ill 
Remarks .—The geographical limits of this race I have not traced. 
Probably it is found throngliout most of middle America. In his work 
on the families and genera of hats (Bull. U. S. Nat. .Mns., No. 57, j). 88, 
1907) Air. Cl. S. Aliller, Jr., figures a skull from the Escondido River, 
Nicaragua, and evidently bases his diagnosis of the genus on the speci¬ 
men, since he mentions particularly the large anterior upper prenudar, 
with its crown in outline nearly an isosceles triangle. This character, as 
I have shown, is found in the race prisons, but not in the bat of eastern 
South America. Probably the specimens from Quintana Koo are from 
nearly the northern limit of the species. 
