1911] Swarth: Alaska Expedition of 1909. 121 



to the Hudsonian, or to the Alpine-Arctie zone in this region, but 

 from our observations its presence would seem to depend largely 

 upon local conditions, open ground being the main' requirement. 

 At Marten Arm, Boca de Quadra, there was a small colony in 

 a meadow at the edge of tide water. They were apparently quite 

 rare at this point. On the Chickamin River Hasselborg found 

 two colonies some distance up the stream, and secured an adult 

 female and an unsexed juvenal. At Port Snettisham they 

 were abundant, the only place where we found them so. Con- 

 ditions were peculiarly favorable to their occurrence here, the 

 mountain slopes being bare of trees to a great extent, and strewn 

 thick with boulders, between which the marmots had their 

 burrows (see plate 4, figure 2). Their shrill whistles were heard 

 from morning to night and the animals themselves could be 

 seen running to and fro, or keeping a lookout from the top of 

 some jutting rock. They were distributed down to tide water. 

 Many half to three-quarter grown juvenals were seen, compar- 

 atively tame and unsuspicious, but the adults were more wary 

 and hard to approach. Two females were collected here, one 

 adult, the other about half grown. On the Taku River Hassel- 

 borg reported hearing one whistle, the only one noted at this 

 point. He ascribes their scarcity to the Indians, who are very 

 fond of the meat. I ate two myself and found them quite palat- 

 able; they were both exceedingly fat. 



The four specimens preserved (nos. 8358-8361) are not appre- 

 ciably different from a- series of M. caligata from the Prince 

 "William Sound region. They, as well as many others seen at 

 close range, are quite uniformly colored, with black occiput and 

 gray shoulders, shading into tawny on the hind quarters and 

 tail, and none were observed that semed to approach at all the 

 very dark colored M. vigilis of Glacier Bay (see Heller, 1909, p. 

 248). 



Sciuropterus alpinus zaphaeus Osgood. 



Osgood Flying Squirrel. 



Two flying squirrels were secured during the summer. One 



was taken on Etolin Island on July 12 (no. 8789), and one at 



Bradfield Canal on July 22 (no. 8790). This is, I believe, the 



