358 Unwersity of California Publications in Zoology | Vou. 24

races whose habitat they approach so nearly. There is hardly a trace
in any specimen of the obscure dorsal streaking seen in altivagans
from more southern and eastern stations. The Kispiox Valley
migrants are even more questionably referred to aitivagans than the
Nine-mile Mountain specimens. Our collecting station in that valley
was northwest of Nine-mile Mountain. Migrating fox sparrows col-
lected there must have traveled from somewhere still farther north,
possibly from some region even nearer the coast. These migrating
birds in appearance are not unlike some specimens of sinwosa. They
differ in shape of bill and in darker, less reddish, coloration, especially
dorsally, TI believe that they are unquestionably intergrades between
altwwagans and the nearby coastal subspecies, fuliginosa. When such
birds are taken far to the southward, in the winter habitat, it is
admittedly difficult to recognize their true relationships (though similar
specimens passing through my hands have been hesitatingly labeled
altivagans), but in this ease the place of eapture affords a valuable
clew. No undoubted specimens of sinuosa have been found migrating
anywhere in the interior of Alaska or British Columbia.

Piranga ludoviciana (Wilson). Western Tanager

Rather uncommon summer visitant in the lowlands. First noted
near Hazelton on June 3, when two were seen ond others heard calling.
Not more than ten or twelve, all told, seen during the summer, the
latest on August 30. Four specimens collected (nos. 42433-42436),
an adult male, and three immature males.

Hirundo erythrogaster Boddaert. Barn Swallow

A few pairs were nesting in buildings in Hazelton. Elsewhere, an
occasional bird passing overhead was all that was seen. First noted
on June 1. On July 20 small flocks were observed flying southward,
apparently migrating.

Iridoprecne bicolor (Vieillot). Tree Swallow

Abundant in the lowlands, and already nesting when we reached
Hazelton, May 26. Seen entering crevices in buildings in the town,
and old woodpecker holes in trees elsewhere. Apparently migrates
scuth at an early date for none was seen after our descent from the
mountains. August 14. One specimen collected, an adult male (no.
42437).