1926] Swarth: Birds and Mammals from the Atlin Region 85 



rarely seen in the groves of poplar (the principal deciduous forest 

 tree), and it follows the spruce up the mountain sides as far as that 

 tree goes. We saw none in the balsam woods of slightly higher altitude, 

 where the blue grouse (Dendragapus) is found. 



Twelve specimens of spruce grouse were collected (nos. 44666- 

 44677) : two adult males, one adult female, one downy chick, near 

 Atlin, June and July; one adult male. Spruce Mountain, August 8, 

 nearly through the molt; one adult female and one immature male, 

 Atlin, August 27, both finishing the molt; one male, Gladys Lake, 

 September 9 ; one male and three females. Fat Creek, five miles west 

 of Lake Teslin, September 13. 



These birds were all taken within fifty or sixty miles of Lake 

 Marsh, the type locality of osgoodi, and may fairly be assumed to be 

 typical of that subspecies. Through the courtesy of Dr. L. B. Bishop 

 I have been able to examine three near-topotypes of osgoodi, females 

 from Lakes Marsh and Lebarge, but these birds, taken in July, are in 

 such worn plumage as to be of little value for color comparisons. Most 

 of the specimens from southern Yukon and northern British Columbia 

 are appreciably different from birds from the northern limits of the 

 habitat of osgoodi, as currently defined. Northern Alaskan birds 

 exhibit the extreme of grayness seen in the species CanacMtes 

 ca/nadensis. One female taken in June at Atlin is as gray as any of the 

 more northern birds, but the rest of the series are less overcast with 

 grayish dorsally, less heavily marked with white on the breast, and 

 are generally more richly colored. For the present it seems best to 

 continue to use the name osgoodi for the race of spruce grouse occur- 

 ring from northern Alaska south into northern British Columbia, but 

 future collecting, especially of series from Alberta and Mackenzie, 

 may show the desirability of a different arrangement. 



Bonasa umbellus umbelloides (Douglas). Gray Euffed Grouse 



An uncommon species in the Atlin region, in our experience. An 

 occasional cock bird was flushed in poplar thickets, and two broods of 

 young were seen during the summer. Aside from the chicks, not more 

 than eight or ten birds, all told, were seen. Two specimens were 

 collected (nos. 44678-44679), adult males, taken September 19 and 21, 

 respectively. 



