Oberholser — A New Subspecies of Perisoreus obscurus. 187 



some vergence toward that form. Two of the adults in this Vancouver 

 Island series (Nos. 15,830 and 15,831, Mus. Vert. Zool. ) are in worn summer 

 plumage; two other adults (15,832 and 15,833, Mus. Vert. Zool.) are 

 badly worn, but on the interscapulum have acquired new plumage which 

 exhibits the true color of the upper part.s. In faded plumage Perisoreus 

 obscurus griseus sometimes closely resembles Perisoreus obscurus obscurus, 

 and unless absolutely comparable specimens are available for comparison, 

 is liable to be misleading. 



The type of Perisoreus obscurus obscurus* came from Shoalwater Bay, 

 Washington, and is typical of the race inhabiting the coast of middle and 

 southern Washington south to northwestern California. The type of 

 Perisoreus obscurus griseus^ was obtained at Keechelus Lake, Kittitas 

 County, Washington, and is a good example of the gray interior race. 

 This makes it clear that the bird from Clallam County, here described as 

 Perisoreus griseus rathbuni, is the unnamed form. 



With the addition of this new subspecies, the races of Perisoreus ob- 

 scurus number three. The ranges of the two hitherto recognized, after 

 the revision made necessary by the subtraction of Perisoreus obscurus 

 rathbuni, will stand as follows: 



Perisoreus obscurus obscurus. — Pacific Coast region of the northwestern 

 United States, east to the coast ranges, from Humboldt County, Califor- 

 nia, north through western Oregon and western Washington to northern 

 Chehalis County, central western Washington, and, at least in winter, to 

 Kitsap County, Washington. 



Perisoreus obscurus griseus. — Northwestern United States, east of the 

 coast ranges, from central northern California, north through the Cascade 

 region of west central Oregon (west to Washington County) and central 

 Washington (except Puget Sound region), to southwestern British 

 Columbia, including Vancouver Island. 



Detailed measurements of the adult specimens of Perisoreus obscurus 

 rathbuni examined in the present connection are included in the follow- 

 ing table: 



"Perisoreus canadensis var. obscurus Ridgway, Bull. Essex Inst., V.November, 

 1873, pp. 194, 199. 



t Perisoreus obscurus griseus Ridgway, Auk, XVI, No. 3, July, 1899, p. 255. 



