186 Proceedings of the Biological Society of Washington. 



shafts; rump and upper tail-coverts, between mouse gray and neutral 

 gray; tail between mouse gray and deep neutral gray, the outer vanes 

 deep mouse gray, the tips of the rectrices brownish white ; wings fuscous, 

 the quills, together with the greater and median coverts and a few of the 

 lesser coverts, narrowly tipped with brownish white; lores dull creamy 

 white, mixed with a few blackish hairs; cheeks, auriculars, and sides of 

 the neck not occupied by the brownish black crescent, together with all 

 the lower parts, including the lining of the wings, brownish white, but 

 the sides, flanks, and crissum heavily washed with brownish gray. 



Measurements. — Male:* wing, 133-144 (average, 139.3) mm.; tail, 124- 

 137 (132.3); exposed culmen, 13-16 (14.8);+ tarsus, 32-34 (33.5) ; middle 

 toe without claw, 17-19.5 (18.1). 



Female:* wing, 130.5-140 (average, 136.3) mm.; tail, 126-132(129.4); 

 exposed culmen, 13.5-17.5 (15.7);+ tarsus, 32-34.5 (33.3); middle toe 

 without claw, 16.5-18 (17.3). 



Geographic distribution. — Resident in northwestern Washington north 

 to Snohomish County and Strait of Juan de Fuca; west to western 

 Clallam County ; south to Clallam County and King County ; and east to 

 central King County and western Snohomish County. 



Remarks. — This interesting new subspecies differs from Perisoreus ob- 

 scurus griseus in its smaller size, much darker upperparts, broader, more 

 whitish, nuchal collar; and thus, while intermediate in size between 

 Perisoreus obscurus obscurus and Perisoreus obscurus griseus, is in colora- 

 tion decidedly darker than either. Our series of Perisoreus obscurus 

 rathbuni is very uniform. A juvenile from Port Townsend, Washington, 

 is in poor condition, but apparently belongs to this race. One specimen, 

 No. 230,604, U. S. Nat. Mus., from Kirkland, Washington, is rather 

 lighter and more brownish than typical birds; and another from Ed- 

 munds, Washington (No. 53, collection of S. F. Rathbun), is considerably 

 more brownish and somewhat lighter, but both are undoubtedly referable 

 to this new form. 



A single specimen in the United States National Museum from Port 

 Gamble, Kitsap County, Washington, taken on December 16, 1880, is 

 apparently referable to Perisoreus obscurus obscurus, although it may be 

 only a winter wanderer in this locality. By courtesy of Dr. Joseph 

 Grinnell, the four adult and four juvenile birds of this species from Van- 

 couver Island, recorded by Mr. H. S. Swarthy as Perisoreus obscurus ob- 

 scurus, have been examined in the present connection. A careful com- 

 parison of these specimens with a series of both Perisoreus obscurus 

 obscurus and Perisoreus obscurus griseus shows that they are in color 

 absolutely the same as Perisoreus obscurus griseus, although in size some- 

 what smaller, about like Perisoreus obscurus rathbuni, and show thus 



* Ten specimens, from northwestern Washington. 



+ It is of importance here to note that measurements of " exposed culmen " in Mr. 

 R. Ridgway's recent account of this species (Bull. U. S. Nat. Mus., No. 50, part III, 1904. 

 pp. 372-374) are really those of the total culmen inadvertently given as exposed culmen. 



t Nine specimens, from northwestern Washington. 



§Univ. Calif. Pub. Zool., X, No. 1, February 13, 1912, pp. 48-50. 



