202 



MONOGRAPHS OF NORTH AMERICAN RODENTIA. 



T.uii.ic L. — Afcanurenuitts vf sUty-iihw nincimrim of Ahvicola xani ihhi.n.i i ins from North America north 



of the I niteil Stolen — Continued. 



Note. — Mr. Keen icon's specimens wore partly taken at Fort Yukon (mouth of Porcupine River) and partly 200 miles 

 southwest of this locality. Besides those tabulated, we have examined several hundred others, all brought from the same 

 region by .Mr. Kennicott. 



Fortunately, the synonymy of this species is plain. It was first described 

 and not very well figured by Leach, as above; Dr. Richardson next noticed 

 it in a more satisfactory detail; then Audubon and Bachman reproduced (lie 

 sense of Ricliardson's article ; and, lastly, Baifd published it upon substantially 



