116 University of California Publications in Zoology [Vou.30

from the ground. Other nests were found, similarly placed, low down
in dead timber. The last flicker was seen September 5.

Two specimens were collected (nos. 44749-44750), a female on
August 17, a male on August 22.

Chordeiles virginianus virginianus (Gmelin). Eastern Nighthawk

The first nighthawk arrived at Atlin on the evening of June 12;
the species was fairly common thereafter in the lowlands. During
the last two weeks in August the southward migration was under way,
and every evening the birds could be seen passing by, all going in
the same direction. Last seen on the evening of September 6. Two
specimens collected (nos. 44751-44752), both females, taken on
August 12 and 20, respectively.

Selasphorus rufus (Gmelin). Rufous Hummingbird

Seen on only three occasions, on June 11, June 13, and July 12, all
within a few miles of the town of Atlin. One of the three was an adult
male, hence easily recognizable, the others were inferentially of the
same species.

Sayornis sayus yukonensis Bishop. Northern Say Phoebe

Present at Carcross upon our arrival, May 22. Breeds in the town
of Atlin, and scattered pairs occur elsewhere, usually about abandoned
buildings. The southward migration of this species was under way
after the middle of August. On August 24, near the summit of a
high mountain, a Say phoebe, first observed perched upon a rocky
pinnacle, was seen starting southward, ascending higher as the moun-
tain was left behind, the beginning of what was to be, apparently,
a long flight. The last Say phoebe was seen at Lake Teslin,
September 10.

I collected three adults (nos. 44753-44755) and Brooks collected
others, and these, together with additional northern specimens in this
museum, bear out the validity of the subspecies ywkonensis (Bishop,
1900, p. 115). The northern bird has a slightly smaller bill than the
southern race; otherwise, differences of measurements between the
two are of slight moment. The color differences, however, are readily
apparent, both in the juvenal and adult plumages, ywkonensis being
clearer gray where sayus is brownish or rusty, as described by Bishop
(loc. cit.).