802 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 



single black speci n of T. striatus I have seen was also marked on llic 



throal with a longitudinal stripe of white, but was elsewhere wholly black. 



Gkogkai'iiical distribution. — The most easterly points from which I 

 have seen specimens of this species are the northern shore of Lake Superior 

 and Nelson's River, Hudson's Bay Territory. To the northward it ranges 

 nearly to the Barren Grounds.* In the United States, it is met with all along 

 the forty-ninth parallel; it is common in the Bad Lands of the Upper Mis- 

 souri and Yellowstone Rivers, in the Black Hills of Dakota, and in the eastern 

 foot-hills of the Rocky Mountains southward to New Mexico. It is repre- 

 sented by some one of its forms thence westward to the Pacific coast, and 

 as far southward as Arizona. In respect to the distribution of the several 

 varieties, little need be said in addition to the remarks respecting their habi- 

 tats already given. The ranges of vars. pallidus and quadrivittatus curiously 

 interblend, the latter occupying the wooded mountain-ranges of the Rocky 

 Mountain plateau, while the former occurs generally over the sterile plains 

 and desert areas from the Great Plains east of the Rocky Mountains to the 

 Great Basin. East of the Missouri, the species appears to occur only in 

 Northern Minnesota and Northern Dakota, its range gradually extending 

 southward west of the Missouri. In the Upper Missouri country, Dr. Cooperf 

 found them in the Bad Lands fifty miles west of Fort Union, and at the 

 eastern base of the Rocky Mountains. I found them also common in the 

 Had Lands of the Yellowstone River, J and even as far eastward as the Little 

 Missouri, and they occur doubtless thence westward to the Rocky Mountains, 

 wherever there is shrubbery. 



In the Old World, this species ranges from the shores of the Okotsk 

 Sea westward over the whole of Northern Asia, and to the Dwina River in 

 European Siberia. According to von Schrenck, it occurs on Saghalien Island, 

 as far southward on the mainland as Hadshi Bay, in lat. 4U°, and in the inte- 

 rior along the whole course of the Amur River and its tributaries. The 

 same writer states that Temminck obtained it in Japan. 



Respecting its range in the Fur Countries, Mr. Donald Gunn observes: — "I have not seen any of 

 thriii iii the Serein River District ; bat they are at Oxford House and Nelsou River. They may inhabit 

 other localities to the' northeast of Lake Winnipeg."— (.VS. Notes in the Smithsonian Institution.) 



Mr. 15. R. Ro«9 j;ivt-s its range as extending to Fort Good Hope, but as being " rare at Fort Simp- 

 son and north of I, bid's River. At Forts Resolution and Liard, these animals are very destructive to 

 such garden produce as is raised there."— (MS. Xotes in Smithsonian Institution.) 



tAmer. Nat. vol. ii, p. 530. 



t Froe. Bost. Soc. Nit. Hist, xvii, 1874, 43. 



