

Vol. XXVI, pp. 183-184 August 8, 1913 



PROCEEDINGS 



OF II I V. 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW BAT FROM THE EASTERN UNITED STATES. 



BY E. W. NELSON. 



The discovery of an undescribed species of bat from the 

 Potomac River a few miles above Washington and from Vermont 

 well illustrates our lack of knowledge concerning this group of 

 mammals. It was first brought to my attention when Mr. 

 George L. Kirk of Rutland, Vermont, sent me for identification 

 two specimens collected April 10, 1913, in a cave near Brandon, 

 Vermont, where he found a considerable colony of bats which 

 had hibernated there during the preceding winter. One of 

 these two specimens proved to be Myotis luriftigus and the other 

 appears to represent the species here described. The collection 

 of the U. S. National Museum, including that of the Biological 

 Survey, was then examined and two other specimens represent- 

 ing the same species were discovered among the series of Myotis 

 lueifugus, with which they had been confused. It appears to 

 be uncommon since only these two could be found among the 

 considerable number of specimens of the last named species 

 from various parts of the Eastern United States in these collec- 

 tions. 



Myotis winnemana sp. nov. 

 LEAST BROWN BAT. 



Type from Plummers Island, Maryland(in Potomac River 10 miles above 

 Washington): No. 150,275, adult 6\ U. S. National Museum, Biological 

 Survey Collection; collected August 31, l n <»7, by Dr. A. K. Fisher. 



Distribution. — Known only from type locality and Brandon, Vermont. 



Description. — In general color closely resembles M. lueifugus but may 

 heat once distinguished by its much shorter forearm and blackish muzzle. 

 Color of upper parts dark rufous chestnut-brown with a tinge of golden; 

 underparts dull grayish brown; muzzle and sides of head blackish as in 



47— Proc. Biol. Soc. Wash., Vol. XXVI, 1913. (183) 



