298 Monograph of the Genus Sdurus. 



of S. capistratns are permanent in their colors, while those of the 

 present may be found of every shade between black and white. 



" On the cheeks there is a slight tinge of yellowish brown, extending to 

 the neck at the insertion of the head ; the inner surface of the ears of 

 the same color, the outer surface of the fur on the ear, which extends a 

 little beyond the outer edge, and is of a soft woolly appearance, is light 

 cinereous edged with rusty brown ; whiskers black and white, the former 

 color predominating. Under the throat, the inner surface of the legs and 

 thighs, and the whole under surface, white ; on the back the fur is dark 

 cinereous near the roots, then light ash, then a line of black and tipt with 

 white, giving it on the outer surface an iron-grey appearance. The tail, 

 which does not present the flat distichous appearance of the majority of 

 the other species, but is more rounded and narrower, is composed of hairs 

 which, separately examined, are of a soiled white tint near the roots, then 

 a narrow marking of black, then white, then a broad line of black, and 

 finally broadly edged with white. 



DIMENSIONS. 



" Length of head and body, - - . - - 

 Ditto of tail, {vertebra) , . . - - - 



Ditto of tail to the tips, --.--- 

 Height of ear posteriorly, 



Palm and middle fore claw, . . . - - 

 Heel and middle hind claw, - - - - - 



Length of fur on the back, 



This species is said to be common in the oak and hickory 

 woods of Pennsylvania. I also observed one in the hands of a 

 gunner near Fredericksburgh, Va. It is very uncommon in the 

 northern parts of New York, but more frequent in the south- 

 ern counties. Its habits are sluggish when compared with the 

 lightness and activity of the grey squirrel. It rarely leaps, and 

 seldom mounts to the tops of trees, but contents itself with creep- 

 ing slowly and cautiously along the branches. 



7. Species leucotis. Northern Grey and Black Squirrel. 



" Grey Squirrel; Pennant's Arctic Zool., vol. i, p. 135; Hist. duad. 



No. 27-2. 

 " Sci. Carolincnsis ; Godnian, non Gmel. 

 " Sciurus leucotis; Gapper, Zool. Journ. vol v, p. 206, published about 



1830. 

 " EssKNT. Char. — Larger than the Carolina Grey Squirrel ; tail much 

 longer than the body ; smaller than the Cat Squirrel ; subject to many 

 varieties in color. 



