140 University of California Publications in Zoology [Vol. 30 



this molt was finished, but the adults apparently left as soon as the 

 young could eare for themselves. No old bird was seen after August 1, 

 and the last few that were noted were still in breeding plumage. The 

 black-poll warbler was numerous up to August 22 ; the last was seen 

 on August 27. 



The Atlin region may be assumed to be about the southwestern limit 

 of the breeding range of this species, and in view of the abundance of 

 the birds at that point it is of interest to note their scarcity farther 

 south in British Columbia. There are only a few scattered records, 

 all but one during fall migration, the southernmost at Quesnelle. 

 Apparently the black-poll warbler has an east and west route over 

 the Rocky Mountains of northern British Columbia, seldom or never 

 traversing the southern two-thirds of the province. 



Eleven specimens were collected (nos. 44935-44945), one adult 

 female, four in juvenal plumage, four in various stages of the post- 

 juvenal molt, and two in first winter plumage. 



Dendroica townsendi (J. K. Townsend). Townsend Warbler 



A few pairs were nesting at isolated points in the lowlands, in 

 clumps of tall spruce trees. They remained in the tree tops and 

 would have been overlooked entirely during the breeding season were 

 it not for the singing males. During the second week in August, young 

 birds in completely acquired first v/inter plumage appeared in the 

 poplar woods, and, while they were never numerous, some were seen 

 daily thereafter during that month. Last noted August 31. 



Two specimens were collected, an adult male, June 5 (no. 44946), 

 an immature male, August 14 (no. 44947). 



Seiurus noveboracensis notabilis Ridgway. Grinnell Water-thrush 



One was collected by Brooks in the bottom lands of Pine Creek 

 near Atlin, August 21. This was the only one seen. 



Geothlypis trichas occidentalis Brewster. Western Yellowthroat 



On September 10 I saw several and heard others in the marsh at 

 Pat Creek, six or seven miles southwest from Lake Teslin and ,iust 

 north of the British Columbia-Yukon boundary. On September 13, 

 retiirning over the same trail, no yellowthroats were seen. Not other- 

 wise observed in the Atlin region, to my surprise, for in September, 



