10(5 ARCTOMYS. 



Color. Upper parts, burnt umber and light yellowish brown. 

 Top of head dark Mars brown; nose whitish; sides of head grizzled 

 pale yellowish. Under parts dull ferruginous; feet black. Tail 

 brownish black. 



Measurements. Total length, 569; tail vertebrae, 136; hind 

 foot, 85. 



b.— canadensis. (G/is), Erxleben, Syst. Anim., 1777, p. 363. 



melanopus, Kuhl. Beitr., 1820, p. 64. 



Type locality. Quebec, Canada. 



Geogr. Distr. Newfoundland to Bering Sea; and from 57° N. 

 latitude to central New England; west to northeastern' Minnesota. 



Color. Face blackish, cheeks gray, nose black. Hairs on the 

 back gray at base, black in the center, whitish or hoary at tip. 

 Beneath golden buff. Feet black. Tail short, blackish. 



136. pruinosus. {Arctomys), Gmel. Syst. Nat., 1788, p. 144. 

 ealigatus, Eschsch., Zool. Atlas, 1829, 11, pi. 6. 



Type locality. Hudson Bay? 



Geogr. Distr. Columbia River northward to the Barren Grounds, 

 east to Hudson Bay. 



Genl. Char. Size large; nasals not extending beyond maxillaries; 

 anterior suture of frontals nearly straight. 



Color. Above anteriorly grayish white, varied with black; pos- 

 teriorly grayish fulvous and black; under parts grayish white; nose, 

 muzzle and chin grayish white; feet black. Tail, hairs reddish 

 brown or black basally, then yellowish white. 



Measurements. Total length, 750: tail vertebra?, 180. 



137. flaviventer. {Arctomys), .\ud. & Bach., Proc. Acad. Nat. Scien. 



Phil., 1841, p. 99. 



Type locality. " Mountains between Texas and California! " 



Geogr. Distr. Western Texas, New Mexico and Arizona north 

 to 49th parallel. 



Genl. Char. Size moderate; ears small; tail bushy, about half 

 as long as body. General color mixed yellowish brown and gray to 

 brownish black. 



Color. Above fulvous, yellowish brown and gray, mixed; below 

 golden to reddish chestnut. Nose and chin whitish gray. Tail rusty 

 yellow; feet blackish. 



Measurements. Total length, 635; tail, 178; hind foot, 65. 



138. dacota. {Arctomys), Merr., N. Am. Faun., No. 2, 1889, p. 8. 

 Type locality. Custer, Black Hills. 



Geogr. Distr. South Dakota; range not determined. 



