Silver-haired Bat 



blotched or mottled with dusky, below uniform yellowish 

 brown. 

 Range. Eastern United States, southern Pennsylvania and lower 

 Hudson Valley, west to Iowa and Texas. About Lake George, 

 N. Y., and probably elsewhere northward occurs a closely re- 

 lated variety, the northern pipistrelle (P. subflavus obscurus 

 Miller), which is darker and less yellow. 



The Georgia bat or pipistrelle is quite common in south-eastern 

 Pennsylvania, apparently much more so than the little brown bat 

 which it so closely resembles when on the wing that identification 

 is practically impossible. 



Silver-haired Bat 



Lasionycteris noctivagans (Le Conte) 



Length. 4 inches. Expanse of wings. 9 to 10 inches. 

 Description. Interfemoral membrane sparsely haired. Fur, dark 



brown or black, with silvery-white tips. Ear short and 



rounded. 

 Range. North America, south throughout Pennsylvania and the 



southern Alleghanies. 



Generally speaking the silver haireo bat is the commonest species 

 in the northern parts of the United States, though as all bats are 

 somewhat local in distribution, one kind will perhaps be more abund- 

 ant in one locality and another in another. It is frequently seen about 

 Philadelphia, although not nearly so abundant there as the large brown 

 and red bats. 



It seems to be an early flier, and my experience coincides with 

 Dr. Merriam's, that it is far more plentiful in the early evening than 

 later on in the night. 



In flight it always seems to be slower and less erratic than the 

 larger species. 



Dr. Merriam says : " Like many other bats it has a decided 

 liking for water-ways, coursing up and down streams and rivers, 

 and circling around lakes and ponds. . . . Next to water 

 courses, the borders of hard-wood groves are the favourite haunts 

 of the silver-haired bat. By standing close under the edge of the 



