• Warren — Notes on Distribution of some Colorado Mammals. 5 



Citellus elegans < Kennicott). 



August 7, 1911, we saw a number of Wyoming Ground Squirrels imme- 

 diately below the mining town of Empire, Clear Creek County, 8260 feet 

 altitude. The animals were seen along the road just after passing through 

 the town. 1 had never heard of this species being anywhere in that region 

 before, and am somewhat at a loss to account for its presence. To my 

 knowledge the nearest point at which it occurs is Fraser, some fifteen 

 miles distant in an airline, and on the other side of the Continental Di- 

 vide. It may possibly have crossed Berthoud Pass, though this hardly 

 seems likely, as most of the intervening country is not of the sort it fre- 

 quents, being very mountainous, and the I 'ass itself having an elevation 

 of II ,000 feet. Nor in fact was the locality where I saw these such as the 

 animal prefers, being a rather narrow rocky gulch. It seems more than 

 likely that this colony has sprung from pet animals some one has turned 

 loose or allowed to escape. If allowed to exist and multiply these animals 

 may eventually become pests by finding their way down the Clear Creek 

 Valley and out into the more open country where there are cultivated 

 lands. They can not do much harm at their present location. 



Citellus obsoletus (Kennicott). 



A specimen of Kennicott's Ground Squirrel was collected, and a few 

 others seen by the roadside between Simla and Mattison, Elbert County, 

 May 24, 1911. This is the valley of Big Sandy Creek, and on the south- 

 ern slope of the Arkansas-Platte Divide, and I think the most western 

 record for that district. June 11, 1911, two were secured near Fosston, 

 Weld County. Not a great deal is as yet known of the distribution of 

 this species in Colorado, but it will no doubt be found in most of the 

 sandy portions of the northeastern plains. 



Eutamias quadrivittatus (Say). 



The range of this species was extended on the eastward of the Medicine 

 Bow Range considerably to the north by the capture of a specimen about 

 2 miles east of Log Cabin, Larimer Comity, altitude 7450 feet, June 16, 

 1911. Cary* gives the known northern limit along the eastern foothills as 

 southwest of Arkins, which is 25 miles south of Log Cabin. On the west 

 side of the North Park specimens taken by me on Mt. Zirkel make an 

 extension of 65 miles north of what may he considered the previous north- 

 western record, Yarmony Creek, Ragle County, which is almost duesouth 

 of Mt. Zirkel, and the latter is only 3 miles north of Log Cabin, though 

 over 60 miles west of that place. It should be remarked, however, that 

 I have previously recorded"! this chipmunk from Grand Lake, Grand 

 County, which is 25 miles north of Yarmony Creek, but 45 miles east, 

 and 55 miles almost due southeast from Mt. Zirkel. The Mt. Zirkel 

 specimens were collected between 9300 and 9800 feet altitude. Specimens 



* N. Am. Fauna No. 33, p. 71. 1911. 



■fr Further Notes on the Mammals of Coli iradi i, Colo. College Pub.: Gen. Ser. No. 33, 

 p. 68, L908. 



