1926] Swa/rth: Birds and Mammals from the Atlin. Region 141 



1909, I had found the species on the lower Taku Kiver, Alaska, which 

 drains from the country immediately south of Lake Atlin (see Swarth, 

 1911, p. 101). Occurrence in migration on the lower reaches of the 

 stream would imply occurrence also toward the head of the river. 



Wilsonia pusilla pileolata (Pallas). Pileolated Warbler 

 Seen at Carcross on May 22 and subsequently, and, in small 

 numbers, migrating in the Atlin lowlands during the first week in 

 June. Occasional birds were seen near Atlin throughout the summer, 

 and these may have been nesting there, but the breeding ground for 

 the most part, if not entirely, lies above timber line. On the higher 

 ridges, pileolated warblers could always be found in the balsam 

 thickets, where, presumably, the nests were placed. 



On August 8, migrating pileolated warblers, with some other small 

 birds, were flitting through the bushes on the summit of Spruce 

 Mountain. Throughout August they could be found daily in small 

 numbers in the poplar woods around Atlin. The last one seen was at 

 Lake Teslin, September 12. 



Three specimens were collected (nos. 44948-44950), an adult male 

 and two immature males. 



Setophaga ruticilla (Linnaeus). American Redstart 



One bird was collected near Atlin by Brooks on June 14, another 

 (no. 44951) by myself on June 17, and several others were seen during 

 June and July. Atlin must be at practically the northwestern limit of 

 distribution of this species. 



Anthus rubescens (Tunstall). Pipit 



This species must breed in some parts of the mountains near Atlin, 

 ■ but we saw none until late in the summer. First encountered August 1, 

 on the summit of Spruce Mountain, and seen several times during the 

 next few days. These were mostly birds in juvenal plumage, but 

 strong on the wing. First seen in the lowlands near Atlin on August 

 26, and frequently observed during the next few weeks. A small flock 

 of pipits was seen from the steamer on Tagish Lake, as I was leaving, 

 September 23. * 



Two specimens were collected (nos. 44952-44953), both in juvenal 

 plumage, taken on the summit of Spruce Mountain, August 3. 



