PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 11 



6. occidentalis Subsp. nov. 



Pacific coast of North America, breeding from mouutains of sontlieru Califoruia to 

 British Cohmibia. 



^SText to mexicana, this is the darkest colored of all the races of this 

 species. Ill extremely slender bill it agrees with moyiiana., but, appa- 

 rently, has a shorter tail (although this apparent difference may be due 

 to an insufficient number of specimens compared — one specimen hav- 

 ing the tail .15 of an inch longer than the longest-tailed specimen of 

 montana), but the colors are strikingly different. Instead of being 

 grayer than rufa, occidentalis is much browner, extreme examples having 

 the light patches of the remiges a bright ochreous-buff" and the general 

 cast of the upper parts a decidedly rusty brown, such specimens com- 

 ing chiefly from the coast of Washington Territory and British Colum- 

 bia. The rump is a bright rusty fulvous, and the crissum always a deep 

 ochreous-buff. Of the European races, this most resembles hrittanica 

 in the color of the upper parts, some specimens being very similar in- 

 deed; but the crissum is constantly much more deeply buff". In the 

 darker- colored examples there is some resemblance to mexicana, in fact 

 some of them have been labeled as such; but the rump is much less 

 chestnut, the ])rimary coverts are always tipped with whitish, and the 

 lower parts more whitish. Specimens measure as follows: 



