. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. siii},'l,'itu(liiial Mtripe of white, but was clsewlicre wholly black. GKoaRAi'JiiCAL DisTKinuTioN.—Tlic inost easterly points from which I have seen specimens of this species arc 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 I'orty-ninth parallel; it is common in the Bad Lands of the Upper Mis- souri and Yellowstone Rivers, in the Black Ilills of Dakot
. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. siii},'l,'itu(liiial Mtripe of white, but was clsewlicre wholly black. GKoaRAi'JiiCAL DisTKinuTioN.—Tlic inost easterly points from which I have seen specimens of this species arc 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 I'orty-ninth parallel; it is common in the Bad Lands of the Upper Mis- souri and Yellowstone Rivers, in the Black Ilills of Dakota, and in the eastern foot-hrils of (he Rocky Mountains southward to New Mexico. It is repre- sented by sonic one of its forms thence westward to the Pacific coast, and as (iir southward as Ariz(ma. 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 quadrivittalus 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 o;cur 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 Bad 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
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