1926] Swarth: Birds and Mammals from the Atlin Region 139

respect they approach rubiginosa, of the Alaskan coast. The juvenal
plumage is extremely dark, sooty almost, different from that of any
other young yellow warblers that I have seen.

Dendroica coronata hooveri McGregor. Alaska Myrtle Warbler

Present at Careross when we arrived, May 22; one was seen there

e carrying nest material on May 23. About Atlin it is a common species,
breeding mostly in the lowlands.

e -A nest with five fresh eggs (Mus. Vert. Zool. no. 1992) was taken
by Brooks on June 15. It was in a slender spruce, one of a small
thicket in a locality that is largely poplar grown, about forty feet from
the ground and near the top of the tree. It rested on the twigs form-
ing the terminal forks of a branch, about three feet from the trunk.
The outer walls of the nest were built mostly of the shredded bark of
fire-weed stalks, with a little fire-weed ‘‘cotton,’’ some coarse grass
and small twigs, and several wing and tail feathers of a small bird.
In the lining there was some horse hair, mountain sheep hair and a
few soft feathers.

« Another nest, containing newly hatched young on June 28, was ina
small jack pine in open woods on the shore of Lake Atlin.

During the last week in August and the first week in September
the southward exodus was at its height. Flocks of warblers, mostly
this species, flitted rapidly through the poplar woods, and there was a
constant stream of myrtle warblers making long flights overhead. The

e last one, a single bird, was seen September 19.

Eight specimens were collected (nos. 44927-44934), one adult
female, five in juvenal plumage, and a male and female in first winter
plumage.

Dendroica striata (J. R. Forster). Black-poll Warbler

Fairly common but easily overlooked. Only one or two pairs were
seen on the mainland, and it was not until the young were hatched
that we discovered that the species was nesting in fair abundance on

« certain islands in Lake Atlin. The birds are inconspicuous, and the
eall-note is sufficiently like that of the abundant Dendroica coronata
to be readily mistaken. The first young, just out of the nest, was seen
July 13, and thereafter the species was encountered commonly. Young
were molting from juvenal to first winter plumage during the last
week in July and first week in August. The young birds lingered until

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