344 University of California Publications in Zoology  |Vou. 24

Hazelton is near the western limit to which the yellow-shafted
flicker might be expected to range; it cannot be far to the westward
that the red-shafted flicker (Colaptes cafer cafer) occurs. It is of
interest that, of the breeding specimens from Hazelton and Kispiox
Valley, nearly all show traces of cafer blood. The four adult summer
males collected all show more or less red in the normally black
‘mustache.’ In females the cafer characters are not so conspicuous,
showing sometimes in a tinge of reddish in the quills, sometimes
in certain details of body markings or color. In one case, wings and
tail are nearly as red as in typical cafer. Some young males (nest-
lings) show red in the ‘mustaches,’ but not so conspicuously as do the
adults.

The flickers that arrived so numerously in September were, I
believe, migrants from the north, from a region far removed from any
chance of admixture with cafer. Five collected at that time are all
typically awratus-like in every detail. In all, twenty-eight yellow-
shafted flickers were collected (mos. 42141-42168). The series includes
twelve nestlings, eight in one lot (the entire brood), and four from
another brood that consisted of six in all.

Chordeiles virginianus virginianus (Gmelin). Eastern Nighthawk

Arrived at Hazelton, June 3. Fairly common in the lowlands there-
after until about the middle of August, when the birds began to
disappear. Last seen August 31. Two specimens collected (nos.
42169-42170), adult male and female.

Cypseloides niger borealis (Kennerly). Black Swift

Abundant throughout the summer. Usually seen flving high over-
head, seldom within gunshot of the ground. One specimen collected
(no. 42171), an adult female, at Kispiox Valley, August 20.

Chaetura vauxi (.J. K. Townsend). Vaux Swift

A few birds (perhaps three pairs) seen occasionally at a certain
spot in the woods near Hazelton. Small flocks or single individuals
noted at long intervals in Kispiox Valley. Last seen September 3.
One specimen collected (no. 42172), an adult male, July 20.