148 University of California Publications in Zoology [Vol. 30 



Marmota caligata caligata (Eschscholtz). Hoary Marmot 



A few were seen on various mountains not far from Atlin. The 

 species is apparently of general distribution, though not numerous, 

 above timber line (about 3500 feet) throughout the region. One speci- 

 men (no. 34276), an adult male, was collected by Brooks near Log 

 Cabin ("White Pass), on September 1. 



Citellus plesius plesius (Osgood). Bennett Ground Squirrel 



Extremely abundant about Carcross. The grounds of the ' ' Gopher 

 Golf Club, ' ' on the outskirts of the town, supported a large population 

 of the squirrels, as is suggested by the club 's name, and we saw them 

 elsewhere wherever we walked. The light sandy soil and open M'oods 

 seem to form a favorable set of conditions for the species. 



In the immediate vicinity of Atlin I saw no ground squirrels, but 

 there were small colonies at certain points in the lowlands within a 

 few miles of town. Above timber line on the nearby mountains they 

 were present everywhere, in some places in great numbers. Along 

 Otter Creek, ground squirrels fairly swarmed, the whole length of the 

 valley and on the surrounding mountains. Between Surprise Lake and 

 Teslin I saw none. Just what the important factors are that determine 

 the local distribution of the species in this region could not be 

 ascertained with certainty, but in general the ground squirrels favored 

 open country. 



The small colonies near Atlin were in open woods, and there were 

 miles of similar woods wher# none was seen. Along Otter Creek they 

 were numerous over ground that was densely grown with willow 

 thickets. None was seen at any time, however, in even fairly dense 

 woods of large conifers. 



On August 24 ground squirrels were abundant and active on the 

 summit of Monarch Mountain. On September 5, at the same place, 

 none was seen. As this was a cold, stormy day, however, their dis- 

 appearance may have been but temporary and due to the weather at 

 that time. 



Five specimens were preserved (nos. 34399-34403), one from Car- 

 cross, May 22, two from Spruce Mountain, July 31 and August 3, 

 respectively, and two from Monarch Mountain, August 24. 



