SECRETARY'S REPORT. 139 



Description. — Head short and broad ; ears broad, naked on the superior 

 margins ; incisors, two in the upper jaw and six in the lower ; canines 

 large and prominent, two in each jaw ; molars, ten in the upper and 

 twelve in the lower jaw ; lips and chin black ; fur on the body and on 

 the upper side of the (interfemoral) membrane, between the hind legs 

 and tail, black at its base, then yellowish brown, then darker, and termi- 

 nated with white. This mixture produces a grizzled or hoary appear- 

 ance, which suggests the name. The fur is of a soft fawn color beneath 

 the neck, and about one-third of the interfemoral membrane, and a 

 strip beneath the wings, about four-fifths of an inch in width, running 

 along the fore-arm to about three-fifths of an inch beyond the wrist, and 

 a spot on the upper side of each elbow and wrist. Length of specimens 

 before rae from 3| to 3f inches ; width from tip to tip of extended wings, 

 13 to 14^ inches. 



V. noveboracemis, (Harlan.) — New York Bat. 

 This is one of our most common species. At twilight they commence 

 their search for prey, which often continues until daybreak ; their appetite 

 being very voracious, they destroy great numbers of insects, of which 

 their food consists. Frequently, several of them may be seen at the 

 same time, busily engaged, and so earnest are they, that they will pursue, 

 for some distance, a stone that may be thrown at them. They often enter 

 through open windows into dwellings, probably in pursuit of house flies. 

 They are readily captured, and will accept insects, or pieces of raw meat. 

 Description. — Head rather flat, tapering suddenly to the nose ; ears 

 broad, naked anteriorly ; incisors short, hardly appearing above the gum, 

 two in the upper and six in the lower jaw ; canines, two in each jaw, 

 short, extending but little beyond the molars ; molars, tuberculated, eight 

 in each jaw ; fur on the cheeks and chin, light tawny ; on the body and 

 head black at its base, then cream-color, then yellowish red, and termi- 

 nated generally with white. On the upper side of the interfemoral 

 membrane, the fur is dai'k-red, and generally without any mixture, and 

 beneath this membrane, for a third its length, and beneath the wings for 

 a strip about half an inch in width, running along the arm and fore-arm 

 to the hand, it is much lighter. The upper side of the wings is entirely 

 naked, with the exception of a spot on each wrist. At the junction of 

 the arm with the body, is a patch of white, which gives this species a 

 distinctive featui'e, easily recognized. Length of specimens before me 

 varying from 3 to 3| inches; width across the extended wings, 9 to 11 

 inches. 



V. noctivagans, (Le Conte.) — Silver-haired Bat. 

 This species is very rarely found in this State, but is more common 

 south, this being probably its extreme northern limit. But very little 

 is known regarding its habits. 



