368 University of California Publications in Zoology  |Vou. 24

Penthestes atricapillus septentrionalis (Harris).
Long-tailed Chickadee

Of general distribution in the lowlands though nowhere abundant.
Not encountered in the mountains. One specimen still in the juvenal
plumage was collected on September 5, but by the last week in August
both adults and young had for the most part finished the molt. At
that time the species seemed much more abundant than earlier in the
year ; a flock of chickadees usually served as a nucleus around which
were gathered a few individuals of various other species, such as
kinglets, warblers, and nuthatches. Seven specimens collected (nos.
42567-42573).

Penthestes gambeli abbreviatus Grinnell.
Short-tailed Mountain Chickadee

Seen only on Nine-mile Mountain, in spruce and hemlock woods
just below timber line, at about 4500 feet altitude. Small flocks seen,
on July 30 and again on August 10. Two specimens collected, an adult
male (no. 42574) in extremely worn plumage, shot on July 30, and a
juvenile female (no. 42575), collected on August 10. (For use of the
name abbreviatus see Grinnell, 1918, p. 510.)

Penthestes hudsonicus columbianus (Rhoads). Columbian Chickadee

Found only near the summit of Nine-mile Mountain. On July 30
and on August 10 Hudsonian chickadees were seen, each time in com-
pany with mountain chickadees. Four specimens collected (nos.
42576-42579), a male and three females, all in juvenal plumage, Hight
adults at hand from more southern points in British Columbia
(Okanagan, Edgewood, Gold Range, Pearson Mountain, and Mabel
Lake) bear out the color characters ascribed to the subspecies colum-
bianus (Rhoads, 1893, p. 23; Ridgway, 1904, p. 414) and thus justify
the use of that name for the British Columbia Hudsonian chickadee.
There are no young birds at hand from the known habitat of colum-
bianus, nor any of typical hudsonicus, for comparison with the young
birds taken on Nine-mile Mountain. The last mentioned, however, are
appreciably darker colored than adult hudsonicus and of about the
same shade as columbianus, so it seems safe to regard them as
columbianus.