1926] Swarth: Birds and Mammals from the Atlin Region 141
1909, I had found the species on the lower Taku River, Alaska, which
drains from the country immediately south of Lake Atlin (see Swarth,
1911, p. 101). Oceurrence 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 smal!
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.