402 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



PENTHESTES ATRICAPILLUS TURNERI (Ridgway). 

 YTTKON CHICKADEE. 



Similar to P. a. septentrionaUs but slightly smaller, coloration grayer 

 above 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 perceptible tinge of buff, except on rump and 

 upper tail-coverts, where very faint, and white of sides and flanks very 

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

 buffy tinge on sides and flanks very much paler than in P. a. septen- 

 trionaUs. 



Adult male.— Ijength (skins), 126-138 (129.5); wing, 62.5-69.5 (66.3); 

 tail, 61.5-6Y (65); culmen, 8.5-10 (8.9); tarsus, 15.5-17 (16.3); middle 

 toe, 9-10.5 (9.6). « 



Adult female.— Length (skins), 129-133.5 (131.7); wing, 64-65 (64.5); 

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

 middle toe, 9-9.6 (9.2).* 



Alaska, west and north of Cook Inlet. 



Parus atricapillus (not of Linnseus) Dall and Bannister, Trans. Chicago Ac. 

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

 1878, 423 (St. Michael, Alaska). 



Parvs airicapUhis septentrionaUs (not Parus septentrionaUs Harris) Nelson, Cruise 

 "Corwin" in 1881 (1883), 60 (shores of Norton and Kotzebue sounds, etc., 

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

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

 way, Proc. 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 occidentaKs (not Paras occidentalis Baird) Turner, Oontr. Nat. 

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



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

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



Plarusi a\tricapillus'\ turneri Osgood, N. Am. Fauna, no. 21, 1901, 80, in text. 



Pljxrus"] (Poecile) atricapillus turneri Hbllmaye, Tierreich, 18. Lief., Mar., 1903, 56. 



PENTHESTES ATRICAPILLUS OCCIDENTALIS (Baird). 

 OREGON CHICKADEE. 



Similar to I', it. utricaplllus but decidedly smaller (except bill and 

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

 gray or very slight buffy slate-gray in spring and summer to deep hair 

 brown or light olive in fall and winter plumage; 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. atricapillas. 



a Fifteen specimens. ii Three specimens. 



