]90 NORTH AMERICAN FAUNA. [no. 127. 



tion ; Buffalo River ; Big Island ; Fort Good Hope ; Fort McPtierson ; 

 Fort Anderson; Anderson River; and Liard River. The context 

 shows that the specimens in this list had chestnut cheeks, so there 

 seems to be no reason for doubting the identification. More recently, 

 Bailey has recorded specimens (in the collection of the National 

 Museum) from Fort Resolution; 'Great Slave Lake;' Fort Rae; 

 Anderson River; and 'Arctic Coast ' [Franklin Bay] east of Fort 

 Anderson ; as Avell as the Cache Pecotte specimens above mentioned. 



Microtus (Microtus) macfarlani Merriam. MacFarlane Vole. 



Little is known of the distribution of this species, which was de- 

 scribed from specimens taken by MacFarlane at Fort Anderson.'' It 

 is closely related to M. operarius of Alaska, but differs in cranial 

 characters. AVith M. drummondi and xanthognathus, which occupy 

 the same general region, it has no close affinities, though superficially 

 it closely resembles the former. 



In addition to several from the type locality, Bailey has recorded 

 specimens from [lower] Mackenzie River; and 'Arctic Coast' [north 

 or east of Fort Anderson]. d I trapped carefully for it on Great Bear 

 Lake and the lower Mackenzie, but failed to secure specimens. 



Microtus (Microtus) mordax (Merriam). Long-tailed Mountain Vole. 

 This is a Rocky Mountain species which ranges northward to the 

 headwaters of the Liard and the Yukon. Specimens taken by Loring 

 at Henry House in September, 1895, and 15 miles south of Henry 

 House, and on the Smoky River trail between Muskeg Creek and 

 Baptiste River, north of Jasper House, in the summer and early 

 autumn of 1896, have been recorded by Bailey. e At his camp in the 

 mountains 15 miles south of Henry House, Loring found the species 

 living in muskegs near timber line. Bailey records also (loc. cit.) 

 two specimens from Liard River. These were taken by A. J. Stone 

 at Hell Gate, and mouth of ' Black River' [probably the Kachika |, 

 and were the types of M. cautus and M. vellerosus, respectively/ 



Microtus (Arvicola) richardsoni (DeKay). Richardson Vole. 



This species was discovered by Drummond " near the foot of the 

 Rocky Mountains " — somewhere in the Jasper House region. Rich- 

 ardson first referred to it under the name Arvicola riparius, and 

 stated, doubtless on the authority of Drummond, that its habits were 

 similar to those of the common water rat (Arvicola amphibius). iim It 



° Monographs X. A. Rodentia, pp. 201, 202, 1877. 



6 N. A. Fauna, No. 17, p. 58, 1900. 



c Merriam, Proc. Washington Acad. Sci., II. p. 24, 1900. 



d N. A. Fauna, No. 17, p. 40, 1900. 



e N. A. Fauna, No. 17. p. 50, 1900. 



f Allen. Bull. Am. Mus. Nat. Hist., XII, p. 7, 1899. 



