180 FAUNA AMERICANA. 



of the back are one inch and three-fourths in 

 length, but the colours do not vary, and it is only 

 durinsj the winter that the ears are fringed. (Say.) 

 Inhabit the United States. The most common 

 species on the banks of the Missouri river. 



Species. 

 6. Sciurus quadrivittahis, Say, Long's Exped. 

 to the Rocky Mountains, vol. ii. p. 45. 



Char. Essent Head brownish, intermixed 

 with fulvous, marked with four white lines ; sides 

 fulvous ; beneath whitish. 



Dimensions. Total length four inches and one- 

 fourth (without the tail ;) of the tail three inches ; 

 of the hair at the tip of the tail nearly one inch. 



Description. Head brownish, marked by four 

 white lines, of which the superior one on each 

 side passes from the tip of the nose immediately 

 over the eye to the superior base of the ear, and 

 the inferior one passes immediately beneath the 

 eye to the inferior base of the ear ; ears moderate, 

 semi-oval; incisors reddish-yellow; back with four 

 white broad lines, and alternate mixed black and 

 ferruginous ones; sides fulvous; beneath whitish; 

 tail moderate, hair black at base, then fulvous, 

 black in the middle, and pale-fulvous at tip ; be- 

 neath fulvous with a sub-marginal black line; 

 thumb of the anterior feet, a prominent tubercle. 



Habit. Nestling in holes, and on the edges of 

 rocks, and do not ascend trees bv choice. The 



