1908.] MAMMALS. 169 



animals are very destructive to such garden produce as is raised 

 there." Allen records specimens from Salt River, Fort Resolution. 

 Fort Simpson. Fort Rae, and Fort Liard. 6 A specimen from Fort 

 Simpson, taken by B. R. Ross, May 8, 1860, agrees very well with 

 specimens from Great Slave Lake and Slave River, and differs 

 markedly from the Nahanni Mountain series of E. caniceps. 



Tyrrell found chipmunks, probably of this form, in the country 

 southeast of Athabaska Lake in the summer of L892. c 



Eutamias borealis caniceps Osgood. Gray-headed Chipmunk. 



While collecting on Mount Tha-on'-tha, at the junction of the 

 Mackenzie and North Nahanni rivers, about the middle of July. 

 1903, Alfred E.Preble and Merritt Cary found chipmunks inhabit- 

 ing the mountain to its summit. They were shy and rather uncommon 

 and were difficult to secure. Four specimens in worn pelage, taken 

 July 11 and 17, agree perfectly with a large series of E. caniceps 

 from various points on the upper Yukon. E. caniceps differs from 

 E. horealis in several particulars, the gray-fringed tail being its most 

 conspicuous character, but the two forms probably intergrade. 



During my trip down the Mackenzie in the summer of 1904 T saw 

 a single individual in a ' brule ' near the base of the same mountain 

 on June 1. and one of my canoemen saw one on the right bank of the 

 Mackenzie near Blackwater River on June 9. 



Sciurus hudsonicus Erxleben. Hudson Bay Red Squirrel. 



This species is abundant nearly throughout the wooded parts of 

 the Athabaska and Mackenzie region. During our trip in 1901 a 

 series of 50 specimens was taken, from the following localities: 

 Athabaska River, 60 miles above Grand Rapid, 1: Fort Chipewyan 

 (including the several camps near by), 30; Slave River (mouth of 

 Peace), 1; Smith Landing, 1; Fort Smith, 7; Fort Resolution. 5; 

 Great Slave Lake (mouth of Northern Arm). 1; Fort Rae, 1. In 

 this series the rufous phase, which characterizes by far the larger part 

 of a series taken in 11)00 between Norway House and Hudson Pay. 

 is absent, and the tails with two exceptions are edged with yellowish 

 gray, this character being very conspicuous. Among the large series 

 taken in the vicinity of Fort Chipewyan, May 20 to June :», L901, 

 only some half dozen are in the summer pelage, the majority being 

 in transition from winter to summer coats. The species was abun- 

 dant, especially at our camp near Point La Brie, L2 miles northeast of 

 the post. Here their nests were very numerous in the spruce- and 



"Monographs X. A. Rodentia, p. 802, istt. These notes may refer in pari 

 to Eutamias caniceps. 

 6 Ibid., i>. Niir ( . 1X77. 

 ''Ann. Rept. ('an. Geol. Surv., VIII (new ser.), p. lll», 1896. 



