Cheiroptera. MAMMALIA. Cheiroptera. xxv 
'J’he nose is blunt, rounded slightly and emarginated, 
the nostrils opening semilaterally. 'I'he sides of the 
face are slightly inflated, and set with small bristles ; 
a similar row of longer hairs surrounds the eyes. 
The upper lip, especially on the sides of the face, is 
more massive than the lower, and is somewhat pro- 
duced. The ears are subrounded. 'L’he posterior 
surface of the ear is covered with hair one half its 
length. The fur of the body is silky and long, in 
front somewhat denser, but longer on the posterior 
portion. It is a light russet red in color, tinged 
with yellow. The hairs are tipped with gray towards 
the neck. At each shoulder, a conspicuous white 
tuft is seen. 'J’he basal joint of the thumb is also 
similarly decorated. 
THE HOARY BAT [Lasiurus cinereus, Allen ). — 
'I'he Vespertilio pruinosus of several writers, V. 
cinereus of Leconte, Scotophilus pruinosus of Gray, 
Nycticejus pruinosus of Temminck, Wagner, Schinz 
and Prince Maximilian, and Lasiurus pruinosus of 
'i’omes. 
'I'he head of this species is large, flat and hairy, 
the sides of the face somewhat inflated, the tips 
slightly whiskered. The nostrils are wide apart, and 
snout rather high and emarginated, the lower lip 
with a smooth naked space anteriorly. The ears are 
as broad as high, of a round form, with a large inter- 
nal lobe. 'They lie close to the head, and nearly cover 
the eyes. 'I'he ears are black on the borders, and 
hairy to a considerable extent without, and less so 
within, the extreme border being naked, 'i'he fur is 
thick and soft in all parts. In color the neck, beneath 
the ears, is a faded yellow, the breast a dark fawn, 
tipped prominently with white ; the two colors com- 
bined give the tint upon the axillae. 'J'he head, and 
[losterior surface of the ears, are of the same yellowish 
hue as the anterior portion of the neck. Below these 
points, the hair is everywhere of a rich chocolate- 
brown, tipped with white. The contrast of color 
gives a brilliant effect, and suggests the term Hoary, 
by which trivial name it is known. 'I'lie dentition is : 
Molars, f ; Canines, -J- ; Incisors, | ; Canines, -f ; Mo- 
lars, f ; = 32 teeth. Specimens have been obtained 
from Nova Scotia and throughout the Southern and 
Western States. It is occasionally found in New 
England. 
Lasiurus intermedias, Allen. — In this species the 
head is large, flat and hairy ; the snout is high, 
emarginate and brown in color ; the nostrils open 
sublaterally. 'I'he sides of the face are somewhat 
inflated, 'i’here is a fringe of short hairs on the 
mouth and lower jaw. 'I'he ears are high, elliptical, 
pointed and nearly hairless. 'I'hey are strongly con- 
vex on the inner border, and quite straight on the 
outer. At the base of the outer border is a well- 
developed lobe. 'I’he fur is not so full as in others. 
'J’he general color is olive-brown. Hairs are black- 
ish at base, of a dirty brown at centre. In front, 
the color is not so dark as in the rear, 'i'he denti- 
tion is : Molars, Canines,!; Incisors, § ; Canines, 
!; Molars, f ; = 30 teeth. The expanse of wings, 
twelve to thirteen inches. (Allen in Froc. Phil. 
Acad. Nat. Sciences.) 
VoL. l.—d. 
Scotophilus. — Leach. 
'i'his genus has the molars less than f, the head 
flat and broad, the lips swollen, tragus bluntish, and 
internal basal lobe of ear rounded and obtuse. It is 
closely allied to Vespertilio ; the wing membranes 
are heavier in the former, and it has a thick and 
leathery ear and tragus. 
CAROLINA BAT [Scotophilus carolineiisis, Geoff ). — • 
Vespertilio of Geoffroy St. hlilaire, Harlan, Godman, 
Leconte and Cooper. The head is flat, nostrils emar- 
ginate. 'I’he ear is shorter than the head, is broad at 
the base, and obtusely rounded at its tip. 'i’he tragus 
is straight on the inner side, and on the other a little 
convex, and is nearly half the height of the auricle, 
and notched at the outer lower part, 'i’he nostrils 
are rather large, separated by an emarginate space. 
'I’he tip of the tail is exserted. 'Lhe hair is uniformly 
bicolored, except on the ears and margins of the 
body. On the back, it is dark plumbeous at the base. 
On the head, the hair is more woolly 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. The fur on the 
under side is lighter than that on the upper. A light 
brown tinge tips each hair. The terminal joint of 
tail is exserted. 'i'he wing membrane is attached to 
the base of the toes, 'i'he dentition in S. carolinensis 
is: Molars,!; Canines,!; Incisors,!; Canines,!; 
Molars, f ; = 32 teeth. 
THE BROWN BAT [Scotophilus fuscus, Palisot de 
Beauvois). — Vespertilio fuseus of Leconte, Vesp. 
arcuatus of Say, Vesp. phaiops of Eafinesque and 
Wagner, Vesp. ursinus, 'L’em. and Prince Maximilian, 
Vesp. gryphus of F. Cuvier and Wagner, Vesp. caroli, 
Leconte, and Scotophilus greeni of Gray. 'I’he ears 
of this are moderate in size, leathery in structure, half 
erect and turned slightly outwards. 'I'hey are convex 
on the inner border, straight on the outer, and slightly 
emarginate in some cases. 'I’he basal lobe is well devel- 
oped. 'I’he tragus is nearly half as high as the auricle, 
straight on the inner border, somewhat convex, and 
diverging on the outer. It resembles the S. carolinen- 
sis very closely, and both approach very near to the S. 
serotinus of Europe, 'i'he dentition is similar to that 
of the last species, 'i’he wing expanse measures from 
nine to eleven inches. It seems to be well distributed 
throughout the Continent. 
THE GEORGIAN BAT [Scotophilus georgianus, 
Allen). — 'ihis is the Vesper, georgianus of F. Cuvier, 
Leconte and Wagner, Vesper, monticolaof Bachman, 
Vesper, crassus of F. Cuvier, and Vesper, salarii of 
the same, 'i’he head is flat, but less heavy and thick 
than the other Scotophili, and moderately hairy, 'ihe 
sides of the face are prominent and studded with 
hairs. 'J’he nose is flat, broad and hairless ; the nos- 
trils are small, oblique and opening sublaterally. The 
fur is thick, long and soft. Color is dark rufous-brow u 
on the back, brighter in front. The base of the hairs 
in front and behind is a dark plumbeous, 'i’he fur 
extends to the upper third of the posterior surface of 
the interfemoral membrane, the anterior surface of 
which is decorated with numerous small tufts, ar- 
