156 FAUNA AMERICANA. 



Mus canadensis, Penn. Dipus canadensis, DavieSj 

 Trans. Lin. Soc. v. iv. p. 155. Canadian jer- 

 boa, Shaw, Gen. Zool. vol. ii. p. 192. pi. 161. 

 (Encycl. pi. suppl. 11. fig. 3.) 



This species has not been hitherto correctly 

 described. The following description is taken 

 from a well prepared specimen in the Philadel- 

 phia Museum. 



Char. Essent. Yellowish above; white be- 

 neath ; ears rather short ; tail nearly naked, longer 

 than the body, without a tuft of long hair at the 

 extremity. 



Dimensions. About the size of a mouse. 



Descrtption. Head small, narrow , pointed ; fa- 

 cial line slightly arched; fore legs very short, 

 four-toed, with a rudiment of a thumb ; hind legs 

 very long, five-toed; thigh and leg nearly of 

 equal length ; nails small, shaped like those of the 

 mouse; ears of moderate length, with elevated 

 and rounded borders, hairy within and without ; 

 colour yellowish-fawn above, whitish beneath ; 

 whiskers very long, fine and black; tail longer 

 than the body, tapering, marked by several nodes, 

 nearly naked, a few fine whitish hairs surround 

 its extremity. 



Inhabit the middle states ; noticed by Maj. 

 Long's exploring party at the base of the Rocky 

 Mountains. Exped. to the Rocky Mountains, 

 V. ii. p. 17. 



