16 APPEXDIX. 



Fur long, soft, bicolored throughout, the superior and inferior parts are 

 of the same color. It is of a deep marron, the point only being touched 

 with white, the hairs " clair sermes," arranged in horizontal lines upon the 

 inferior part of the interferaoral membrane, are white. 



Length, 3 in. 6 lines, of which the tail is 1 in. 3 lines ; expanse, 10 

 inches ; antibrach., 1 in. 6 lines. 



This species was furnished us by Prince Max Wied, who obtained it in 

 the mountain recesses of North America. Ours come fium the borders of 

 Missouri. 



V. caroli. — Tail the form of our V. pipistrellus, but the ears are longer. 

 Face obtuse ; nostrils very much separated ; ears are of medium size, ovoid, 

 slightly emarginate on their external border without having a lobe or pro- 

 longation. Upper incisors 4, in pairs above, and 6 below. Molars 6 iu 

 all ; the two first false molars of the upper jaw very small, short and 

 pointed. Fur bicolored throughout. Face, sides of neck, and all of the 

 superior part of a reddish brown, with black at the base ; beneath of a 

 yellowish-white at the point, with a deep brown at base, which iu some 

 parts is of a faint yellowish-ash. The young have a more sombre hue. 

 The extreme tip only of the superior parts is brown ; that of the inferior 

 is of a deep brown. 



Total length, 3 in. 3 lines, the tail of whicli is 1 in. and 4 lines ; expanse 

 of wing membrane, 8 in. 6 lines ; antibrachium, 1 in. 4 lines ; height of 

 ear from skull to the tip, 5 lines. The young have an expanse of 7 in. 10 

 lines to 8 inches. 



The Museum has obtained from Prince de Musignano— Chas. Bonaparte — 

 many individuals of this species. 



Hub. K. America, around the environs of New York and Philadelphia. 



V. erythrodactyhcs. — Less than the V. pipistrellus. The forearm, base of 

 fingers, and the interdigital membrane of the first fiuger is reddish, the 

 other membranes are black. Ears haired from their base the greater 

 portion of their height, small, ovoidal. Tragus subulate ; tail very long, 

 point free ; interfemoral membrane haired above ; beneath the hairs are 

 arranged along the veins ; it is of a silky texture, very short, and sparingly 

 distributed. Incisors 4, in pairs above, and 6 below. Five molars in all, 

 only one false molar in the upper jaw. 



Fur long, fine and silky ; above tricolored, beneath bic(ftored. All the 

 superior parts of a faint brownish red ; but a little yellow about the head 

 and neck ; the hairs are black at their base, afterwards yellow and the tip 

 brownish red ; superior part of interfemoral membrane very furry ; be- 

 neath brown at base and brownish red at tip ; the sides of the interfemoral 

 covered with sparse hairs. 



Length of tail, 2 in. 10 lines, or 3 in. maximum, that of tail 1 in. 4 lines ; 

 forearm, 1 in. 2 lines ; expanse of wing membrane, 7 in. 6 lines, or 8 in. 

 maximum. 



The Museum duPays Bas possesses many individuals of this supposed 



