a BULLETIN NO. VII. 
Nycticejus pruinosus TEMMINCK. Monogr. Mam. 1835. 
ScHINZ. Synop. Mam. Mass., 1845. 
Max V. WiepD. Arch. Naturg., 1861. 
Lasiurus Pruinosus TomgEs. Proc. Zool. Soc., 1857. 
Lasiurus cinereus H. ALLEN. Monog. Bats N. A., 1864. 
J. A. ALLEN. Cat. Mam. Mass., 1869. 
Atalapha cinerea Dopson. Cat. Chiropt., Brit. Mus., 1878. 
BAIRD. Mam. U.S. 
Atalapha (Lasiurus) cinereus COUES, Surv. 100th Mer. Zool., 1875. 
In form and general appearance much like the last with 
which it is sparingly distributed. It may at once be disting- 
uished in ordinary cases by the black upon the face and mar- 
gins of the ears. The head is large, blunt, and moderately in- 
flated at the cheeks. Nose emarginate, nostrils being widely 
separated, lateral. Ears large, sub-quadrate, strongly lobed 
at the base in front, margins revolute, black. Tragus rather 
small, anterior border nearly straight, hairy without. 
Fur long, soft and thick. General color above yellowish 
brown with a hoary admixture; interfemoral membrane dark 
brown, with a heavy superficial grizzle of gray; top of head 
creamy yellow, with some mixture of darker and white hairs. 
There are a few yellowish hairs upon the humeral membrane, 
while the shoulders and the edge of the interfemoral membrane 
are strongly suffused with rufous. There is a broad collar of 
creamy yellow, while the breast and belly are olive brown over- 
laid with much yellowish white. The muzzle, lower jaw, a 
band including the eyes and extending upward near the fore- 
head, and the rim of the ears are black. 
The inside of the ears and upper anterior part yellow. The 
under parts of the wings are clothed near the humerus with 
woolly yellow hair; the base of the interfemoral membrane be- 
low is densely covered with dirty yellow hairs. The mem- 
branes are black, except near the fingers and bones of arm, 
where they are yellowish. The hairs on the back have four 
colors, beginning with a base of dark olive brown, nearly black, 
then follows a baud of creamy yellow, more or less inclined to 
rufous outwardly, then a black band and a short white terminal 
portion. 
Total length, 4.8; nose to anus, 2.5; nose to eye, 0.3; tail, 2:2; 
nose to anterior edge of ear, 0.4; height of ear (medianly), 0.6; 
total vertical extent of ear, 0.7; width, 0.5; expanse, 14-15; 
radial part of wing, 21; thumb, 0.4; proximal phalanx of second 
digit, 2.25; distal, 0.8; third digit, proximal phalanx, 2, 10, II, 
0.5, III, 0.6, also bearing a curved nail giving the wing a lobate 
