210 MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 



mens received." McKees's Rocks, i. Butler Co., Leasureville, i. Todd, 

 1902. Crawford Co., Meadville, i. Miller, 1897. 



Genus Lasionycteris Peters, Montsaberichte Koenig Preuss. Akad. Wissen- 

 schaften, Berlin, 1866, p. 648. 



Silvery Black Bat. Lasionycteris noctivagans (Leconte). 



1831. V.\es>pertilio~\ noctivagans Leconte, McMurtries' Cuvier's Animal 

 Kingdom, vol. i, p. 431. 



1894. Lasionycteris noctivagans Cuvier Supra cit. 



Type locality. Eastern United States. 



Faunal distribution. Hudsonian, Canadian, transition and upper austral 

 zones : Atlantic to Pacific Oceans. Rare in middle austral zone. 



Distribution in Pa. and N. J. Numerous in all parts of the country where 

 I have collected bats, but appearing to diminish in the lowlands of southern 

 N. J. ; not nearly as abundant in Camden Co., N. J., as in Philadelphia Co., 

 Pa., through only separated by the Delaware River. Mr. Todd, who has 

 collected many bats in the region of Pittsburg, only reports one of this 

 species from Westmoreland Co. Dr. Abbott says it is not common in N. J., 

 " Have met with but few in a very large collection." Geol. N. J. 



Habits, etc. Merriam speaks of the preference of this species to hunting 

 food over water, skimming around like swallows. It is the earliest species of 

 bat to appear after sunset and by far the most common bat in the Adirondack 

 region, 63 out of 70 specimens found in a cave being noctivagans. The 

 young, i to 2 in number, are born in early July. 



Description of species. This bat is instantly distinguished from all other of 

 our American bats by its peculiar color, a deep black-brown, less brown than 

 black, more or less abundantly tipped with silvery white except on the head. 

 The dental formula for the species and genus is : incisors, |^ ; canines, *~j ; 

 premolars, |^ ; molars, ||, or 36 teeth in all, 20 in the lower jaw and 16 in 

 the upper jaw. The back of the tail membrane is hairy on the basal and 

 naked on the terminal half. 



Measurements. Total length 100 mm. (4 in.); tail vertebrae, 40 (i T 9 ^); 

 forearm, 40 (i T V) 



Genus Pipistrellus Kaup, Skizzirte Entw. Gesch. u. Naturl. Syst. der Europ 

 Thierw., vol. i, p. 98. 



Georgia Pigmy Bat. Pipistrellus subflavus (F. Cuvier). 



1832. V. \_espertilio~\ subflavus F. Cuvier, Nouveaux Annal. Museum d' 

 Histoire Naturelles, Paris, vol. i, p. 17. 



