402 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



PENTHESTES ATRICAPILLUS TURNERI (Ridgway). 

 YUKON CHICKADEE. 



Similar to P. <i. xej^teiifrlonah's l)ut slightly sinallor, coloration grayer 

 aljove and more extensively or purely' white beneath, and white 

 edgings of greater wing'-coverts, secondaries, and outermost rectrices 

 broader, more purely white; in spring and summer plumage the gray 

 of upper parts without i)erceptil)le tinge of buff, except on rump and 

 upper tail-coverts, where ver}' faint, and white of sides and tlanks very 

 faintly, if at all, tinged with buff; in fall and winter plumage the 

 i)uffy tinge on sides and flanks very much paler than in P. a. septen- 

 trionalls. 



Adult male.— "Length (skins), l!>5-13S (129.5); wing, 62.5-69.5 (6().;'5); 

 tail, 61.5-67 (65); culmen, 8.5-10 (8.9); tarsus, 15.5-17 (16.8); middle 

 toe, 9-10.5 (9.5). « 



Adult female.— Length (skins), 129-183.5 (181.7); wing, 61-(;5 (61.5); 

 tail, 62.5-64.5 (63.7); culmen, 8.5-9.5 (9); tarsus, 15-16.5 (15.8); 

 middle toe, 9-9.5 (9.2).'' 



Alaska, west and north of Cook Inlet. 



Parxs atricapillu!^ (not of Linnaeus) Dall and Bannister, Trans. Chicago Ac. 

 Sci., i, 1869, 280 (Nulato, St. Michael, and Kadiak, Alaska).— Adams, Ibis, 

 1878, 423 (St. Michael, Alaska). 



Parus atricapillus septentrlonalis (not Par us septoitrionaVs Harris) Nelson, Cruise 

 "Corwin" in 1881 (1888), 60 (shores of Norton and Kotzebue sounds, etc., 

 Alaska); Rep. Nat. Hist. Spec. Alaska, 1887, 211 (Alaska; habits, etc.).— 

 American Ornithologists' Union, Check' List, 1886, no. 735o, part. — Ridg- 

 way, Proe. U. S. Nat. Mus., xvi, 1893, 665 (Kadiak).— Bishop, North Am. 

 Fauna, no. 10, 1900, 92 (Bennett, Caribou, Crossing, Lake Lebarge, lower 

 Yukon, etc., Alaska). — Grinnell (J.), Pacific Coast Avifauna, no. 1, 1900, 

 59 (Hunt R., Alaska) ; Condor, iii, 1901, 22 (Kadiak).— 



Parus atricapillus occidental Is (not Paras occidentaUs Baird) Turner, C'ontr. Nat. 

 Hist. Alaska, 1886, 182 (Yukon district, St. Michael, etc.). 



Parus atricapiUus turneri Ridgway, Proc. Biol. Soc. Wash., ii, Apr. 10, 1884, 89 

 (St. Michael, Alaska; coll. U. S. Nat. Mus.). 



P[ar?i.s] altj^icapllhis'] turneri Osgood, N. Am. Fauna, no. 21, 1901, 80, in text. 



P\_arusli {Poecile) atricapillus turneri Hellmayr, Tierreich. 18. Lief., Mar., 1903, 56. 



PENTHESTES ATRICAPILLUS OCCIDENTALIS (Baird). 

 OREGON CHICKADEE. 



Similar to J\ a. <ifriaiplUns h\xt decidedly smaller (except bill and 

 feet) and coloration very much darker; back varying from deep mouse 

 gra}" or very slight l)uffy slate-gi'ay in spring and summer to deep hair 

 brown or light olive in fall and winter plimiage; sides and flanks 

 (broadly) pale grayish buff in spring and summer, deep brownish buff, 

 wood brown, or Isabella color in fall and winter; whitish edgings of 

 innermost greater wing-coverts, secondaries, and exterior rectrices 

 more restricted than in P. a. atricapiUus. 



"Fifteen specimens. ''Three specimens. 



