SCOTOPHILUS. 29 



IV, 1837, 60.— DeKay, Nat. Hist. N. Y. (Zool.), 1842, 10, pi. ii, f. 1.— 

 Desji. Mam. 1820, 136.— Temmixck, Monog. II, 1835, 237.— Leconte, 

 Proc. Acad. Nat. Sci., 1855,434.— Wagner, Schreb. Saug. V, 1855, 753. 



Description. — Head flat ; nostrils emargiuated ; ear not quite 

 as long as the head, broad at base, obtusely rounded at tip ; 

 tragus straight on the inner side, slightly convex on the outer, 

 nearly half the height of the auricle and notched at the outer 

 lower part. The inferior anterior part does not reach the angle 

 of the mouth. Nostrils rather large, separated by an emarginate 

 space. Tip of tail exserted. 



Hair uniformly bicolored, except on the ears and margins of 

 the body ; on the back it is dark plumbeous at base, the upper 

 half varying from dusky cinereous to dark brown. On the head 

 the hair is more lauuginous and thickly set ; it covers half the 

 posterior part of the ears, and runs on almost to the nose ; in the 

 latter portion it is longer, and bicolored, as in the back. 



Fur on the under surface lighter than on the upper. A light 

 brown tinge tips each hair — the lower two-thirds being dark cine- 

 reous, verging to black. As the hair in front approaches the 

 head it also becomes woolly like that on the back, and has a 

 tendency to assume one color. This appearance terminates at 

 the anterior inferior border of the ear. 



Interfemoral membrane ample ; basal fifth furred posteriorly, 

 faintly dotted with minute tufts of hair elsewhere. Terminal 

 joint of tail exserted. Wing membrane attached to base of toes. 

 In many specimens the calcaneum is well developed. 



Fi.-. 26. 



Scotophilus caroliLieusis. ^MiiyLilied.) 



Skull. — The skull is large, and slightly crested behind. 



