140 University of California Publications in Zoology [Vou.30

this molt was finished, but the adults apparently left as soon as the
young could care 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 winter plumage appeared in the
poplar woods, and, while they were never numerous, some were seen
daily thereafter during that month. Last noted August 31.

e 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
Fat Creek, six or seven miles southwest from Lake Teslin and just
north of the British Columbia~Yukon boundary. On September 13,
returning over the same trail, no yellowthroats were seen. Not other-
wise observed in the Atlin region, to my surprise, for in September,