368 University of California Public ations in Zoology ['^^o^- 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 an.d 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 Hudsonia^i 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. Bight 

 adults at hand from more southern points in British Columbia 

 (Okanagan, Bdgewood, 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 anj' of typical htidsonicus, 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. 



