1926] Swarth: Birds and Mammals from the Atlin Region 129
body coloration, but the former is slightly darker colored as a rule.
Coronata has a heavier bill than the white-crowned sparrows, and this
character is apparent in the young birds.

The accompanying illustration (pl. 4) was made from studies of
the freshly killed bird. The yellowish tinge to the lower parts, as there
shown, is an evanescent color that soon disappears from the study skin.
Color of bill and feet in the picture is, of course, as those parts were
in the living bird.

On September 5 I made my last climb to the summit of Monarch
Mountain, and on that day but a single golden-crowned sparrow was
noted, the last for the season.

In all, I collected six specimens of the golden-crowned sparrow
(nos. 44822-44827), as follows: one adult female (with the first set
of eggs), two males in juvenal plumage, and three birds in various
stages of the post-juvenal molt.

Spizella monticola ochracea Brewster. Western Tree Sparrow

An abundant summer visitant in the region at an altitude higher
than the town of Atlin. Tree sparrows may appear in the lowlands
upon their advent in the spring, but when we arrived, at the end of
May, they were already established on their nesting ground and we
saw none in the valley. We found them in abundance at the head of
Cafion Creek (from 3500 to 4500 feet altitude) and in somewhat
similar surroundings at the same elevation on upper Otter Creek. In
each place they occurred where willow is the prevailing tree growth,
ranging in size from scrubby, mat-like thickets that can be walked
over, to tangled bushes ten feet high or more. The tree sparrows were
practically always found in or about the willows.

On June 30 tree sparrows appeared to be carrying food to young
in the nest; by the last week in July the young were going through the
post-juvenal molt. During September a few migrating tree sparrows
appeared in the lowlands. Single birds were seen at Lake Teslin,
September 12, and near Atlin on September 19 and 21. Eleven
specimens were collected (nos. 44828-44838), two adult females in
worn breeding plumage, eight young (July 30 to August 6) in various
stages of the post-juvenal molt, and one immature female in first
winter plumage.