﻿112 



XORTH AMERICAN FAUNA. 



GeograpJuc distribution. — Central America and southern Mexico. 

 Limits of range anknowu. 



General characters. — Apparentlj^ most like Lasiuriis horeaUs teJiotis, 

 but feet, interfemoral membrane, and under side of wings mucli less 

 liaiiy. 



Uars. — In dried specimens the ears appear to be essentially as in 

 L. horealis teJiot is, though the external basal lobe may be slightly more 

 developed. 



.Membranes and feet. — These show no distinctive characters. 



Fnr and color. — On the hody the far shows no peculiarities as com- 

 l)ared with the other subspecies. On the interfemoral membrane it 

 extends thickly to about the middle, then becomes more sparse, and 

 finally disappears, leaving the edge of the membrane bare. The backs 

 of tUe feet are scarcely furred. On the under side of the wings, the 

 area behind the forearm which is densely furred in the other sub- 

 s}=ecies, is merely sprinkled with inconspicuous hairs: these are. how- 

 ever, more dense at the bases of the fingers. The antebrachial mem- 

 brane is also very sparsely furred. 



Color as in L. borealis teJiotis. 



Jleasurernents. — See table, page 115. 



Specimens examined. — Total number, 8, from the following localities : 



Jalisco : , 6. 



TeliuauTepee : Gnichicovi, 1 (skinj. 



Vera Cruz: Peuuela luear Cordova). 1 i^skin). 



General remar'ks. — From the unsatisfactory material at my disposal it 

 appears that ic's/^^r^fs borealis mexicanii.s is a well-marked race, most 

 like teliotis. but difi'ering from this, as well as from all the other known 

 subspecies, m tlie restricted peripheral distribution of the fur. 



LASIUEUS CIXEREUS (Beaiivois). Hoary bat. 



1796, Vespertilio Tinereus Palisot de Beauvois. Catal. Peale's Museum. Philadelpliia, 



p. 14. (Oljvions mispriuT for ciuei-ens.) 

 1823. V€S2)eriiUo 2)}'^i>iiosns Say. Long's ExY)ed. to Eocky Mts., I, p. 167 (footnote). 

 1861. Lasiurus cinereus H. Allen, Monogr. N. Am. Bats, p. 21. 

 1878. AtaJapha cinena Dobsou, Catal. Cbiroptera Brit. Mns.. p. 272. 

 1893. Aialaplia clnerea H. Allen, Monogr. Bats N. Am., p, 155. 



Type locality. — Philadelphia, Pennsylvania. 



Geographic distribution. — Boreal Xorth America from Atlantic to, 

 Pacific. The hoary bat breeds within the Boreal zone, but in autumn 

 and winter it migrates south to the southern border of the United States 

 and probably much farther. 



General characters. — Size, large (forearm, over 50 mm.); prevailing 

 color, graj'; ears with black rims: forearm with distinct patch of fur 

 near base. 



Ears. — The ears of Lasiurus cinereus are in general similar to those 

 of L. borealis. but are broader in proportion to their length (see table of 

 measurements, p. 115). The external basal lobe is less developed than 



