712 BULLETIN 50, UNITED STATES NATIONAL MFSEDM. 



WILSONIA PUSILLA PILEOLATA (Pallas). 



PIIEOLATED WARBLER. 



Similar to W. p. jmsilla, but averaging larger; coloration brighter, 

 the upper parts more yellowish olive-green, the yellow of under parts 

 brighter. 



J.(iMZ!!ma?«.— Length (skins), 105-114(109); wing, 55-60 (57.5); tail, 

 47-52 (50.1); exposed culmen, 7-9 (8.3); tarsus, 18-20 (18.9).^ 



Adult fem.ale.—L&ngi\x (skins), 105-116 (109.2); wing, 54.6-57 (55.4); 

 tail, 47.5-50 (48.3); exposed culmen, 7.5-9 (8.5); tarsus, 18-19.5 (18.8).' 



Western North America; breeding throughout the Rocky Mountain 

 district, from western Texas (Chisos Mountains), New Mexico ?, and 

 Arizona ?, in higher mountains, northward to Alaska, including coast 

 district (Kadiak, Yakutat, Sitka, etc. ) as well as throughout the interior, 

 westward to eastern Oregon (Fort Klamath; Tillamook) and Queen 

 Charlotte Islands, British Columbia; during migration over the whole 

 of western North America (less commonly along the Pacific coast of 

 United States ?), and eastward across the Great Plains to Minnesota 

 (Fort Snelling, May), western Missouri (Independence), etc. ; in winter 

 southward over whole of Mexico and Central America to Chiriqui 

 (Boquete). 



Motacilla pileolata Pallas, Zoogr. Eosso-Asiat. , i, 1826, 497 (Kadiak Island, 



Myiodioctes pusillus va,T. pileolata Ribgway, Am. Journ. Sci., iv, Dec, 1872, 457, 



part; Am. Nat., vii, 187.8, 608, part (diagnosis, etc.). 

 Myiodioctes pudllus var. pileolatus Baird, Brewer, and Ridgway, Hist, N. Am. 



Birds, i, 1874, 319, part.— Lawrence, Bull. U. S.'Nat. Mus., no. 4, 1876, 16 



(Guichicovi, Chiapas). 

 [Myiodioctes pusiUus] fi. pileolata Ridqway, Orn. 40th Parallel, 1877, 437 (Truckee 



Valley, Nevada, Aug. 6; lower Humboldt Valley, Nevada, Sept. 5; West 



Humboldt Mts., Nevada, Sept. 9). 



' Twenty-one specimens. 

 '' Ten specimens. 



Specimens from Kadiak Island compare with others in average measurements as 

 follows: 



