374 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult maZe.— Length (skins), 231-269 (264); wing, 138.5-151 (143.5); 

 tail, 130.5-143.5 (188); exposed culmen, 18-20.5 (19.5); depth of bill 

 at base, 9.5-11 (10); tarsus, 33.5-36 (34.5); middle toe, 16.5-18.5 (17).« 



Adult fewale.—'L^&n^'a. (skins), 246.5-269 (254.5); wing, 134.5-144 

 (140.5); tail, 131-139.5 (135); exposed culmen, 17.6-20.5(19); depth 

 of bill at base, 9.5-10.5 (10); tarsus, 32.5-33.5 (33); middle toe, 16.5- 

 17.5 (17).» 



Interior districts of northern California'' (northern Sierra Nevada, 

 upper Sacramento Valley, Mount Shasta, etc.), north through central 

 Oregon and Washington to interior of British Columbia. 



Perisoreus canadensis (not Corvus canadensis Linnseua) Newberry, Eep. Pacific 

 E. R. Surv., X, pt. vi, 1857, 85 (upper Sacramento Valley and Fort Reading, 

 California; Columbia E.). — Feilner, Aim. Eep. Smithson. Inst, for 1864 

 (1865), 427 (Lassens Butte and Shasta Butte, u.. California; habits). — Cooper, 

 Orn. Cal., 1870, 307, part (n. California and higher Sierra Nevada). 



Perisoreus canadensis canadensis Howe, Osprey, new ser., i, 1902, 104, part (crit.).<2 



Plensoreus] obscurus (not Perisoreus canadensis, var. obscurus Eidgway) Hen- 

 SHAW, Orn. Eep. Wheeler's Surv., 1879, 308 (n. e. California to Columbia 

 E.; habits; crit.). — Eidgway, Man. N. Am. Birds, 1887, 360, part. 



Perisoreus obscurus Eidgway, Nom. N. Am. Birds, 1881, no. 298, part. — Ameri- 

 can Ornithologist's Union, Check List, 1886, no. 485, part. — Townsend, 

 Proc. U. S. Nat. Mus., x, 1887, 211, part (Mount Shasta, near timber line). — 

 Merrill, Auk, v, 1888, 261 (Fort Klamath, e. Oregon). — Belding, Land 

 Birds Pacific Distr., 1890, 111, part (upper Sacramento Valley, Lassens 

 Butte, Shasta Butte, Camp Bid well, etc.). — Bbndire, Life Hist. N. Am. 

 Birds, ii, 1895, 394, part.— Merriam, North Am. Fauna, no. 16, 1899, 119 

 (Mount Shasta, 5,900-6,600 ft.). 



Perisoreus canadensis obscurus Meart^s, Bull. Nutt. Orn. Club, iv, Oct., 1879, 195 

 (Fort Klamath, e. Oregon). — Coues, Check List, 2d ed., 1882, no. 361, part. 



Perisoreus canadensis [y. obscurus?) Eidgway, Proc. U. S. Nat. Mus., i, 1879, 423 

 (Summit Meadows, California). 



[Perisoreus canadensis var. capiialisi b. obscurus CouES, Birds N. W., 1874, 221, 

 part (in synonymy) . 



P[erisoreus'] c{_anadensis'] obscurus CouBS, Key N. Am. Birds, 2d ed., 1884, 425, 

 part. 



Perisoreus obscurus griseus Eidgway, Auk, xvi, July, 1899, 255 (Keechelus Lake, 

 Kittinas Co., e. Washington; coll. U. S. Nat. Mus.).— American Ornithol- 

 ogists' Union Committee, Auk, xviii, 1901, 302 (Check List no. 485a). 



P[erisoreus'] o^bscurusl griseus Bailey (Florence M.), Handb.' Birds W. U. S., 

 1902, 279. 



"Eight specimens. 



'' Six specimens. 



c Specimens from northern California (Mount Shasta, Camp Bid well, etc.) and 

 adjacent parts of Oregon (Fort Klamath) are not typical, being both browner and 

 smaller than examples from eastern Washington and British Columbia. They are 

 however, nearer the latter than to the coast form (true P'. obscurus). 



d Comment on the critical remarks in the paper cited are quite unnecessary. 



