710 BULLETIN 50, UNITED STATES NATIONAL MUSEUA*. 



Sylronia microcephala Ridgway, Proc. U. S. Nat. Mus., viii, Sept. 2, lo85, 354 

 (substitute for names minuia and pumilia, preoccupied). — American Orni- 

 thologists' Union, Check List, 1886, 357 (Hypothetical List, no. 25). 



S[ylvania'\ microcephala Ridgway, Man. N. Am. Birds, 1887, 527. 



Wll^SONlA PUSILLA PUSILLA (Wilson). 

 WILSON'S WARBLER. 



Adult male. — Forehead, superciliary reoioii, orbital region, and entire 

 under parts gamboge or lemon yellow, the sides and Hanks slightly 

 tinged with olive-green; crown glossy blue-black, the feathers slightlj^ 

 elongated, distinctly outlined; rest of upper parts uniform olive-green, 

 the auricular region and sides of neck similar ]>ut rather moi'e yellow- 

 ish; maxilla dark brown, more blackish terminally; mandible paler 

 brown, especially toward base; iris brown; legs and feet light brown- 

 ish; length (skins), 103-113 (108.-1:); wing. 53-57.5 (55.6); tail, 46.5- 

 50.1 (48.1); exposed culmen, 7-9 (8); tarsus, 17-19 (18.2).' 



Adadt female. — Similar to the adult male and often not distinguish- 

 able; usually, however, slightly duller in color, with black crown- 

 patch more restricted or more or less obscured by olive-green tips or 

 margins to the feathers; sometimes the black entirely absent, the 

 whole pileimi, except forehead, being olive-green, the forehead and 

 superciliary region yellow; length (skins), 104-113 (107.2); w^ng, 52- 

 55 (53.6); tail, 46-49.5 (47.5); exposed culmen, 8-9 (8.4); tarsus, 17- 

 18.5 (17.9).'' 



Eastern North America; north to Newfoundland, Labrador (Eskimo 

 River), shores of Hudson Bay, and Manitoba; west to eastern edge of 

 the Great Plains; breeding southward to Nova Scotia, New Brunswick, 

 Maine, Massachusetts^, Ontario (Ottawa), etc.; in winter south to 

 Santo Domingo and eastern Mexico in States of Tamaulipas, Nuevo 

 Leon (Montei-ey), Pue})la (Huexotitla?; Piiebla?), Vera Cruz (Jalapa^; 

 OordovaC), etc.; occasional during migration in Colorado (Fort Gar- 

 land. May), Arizona (Tucson, May; Fort Whipple, May), and other 

 parts of the Rock}^ Mountain district. 



Miiseicapa pusilla Wilson, Am. Orn., iii, 1811, 103, pi. 26, fig. 4. — Bonaparte, 

 Journ. Ac. Nat. Sci. Phila., iv, 1824, 179. — Willis, Ann. Rep. Smithson. 

 Inst, for 1858 (1859), 281 (Nova Scotia). 



Wilsonia pusilla Bonaparte, Geog. and Comp. List, 1838, 23. — Allen, Proc. 

 Essex Inst., iv, 1864,64 (Massachusetts; breeding?).— Coues, Bull. Nutt. 

 Orn. Club, v, 1880, 95.— Stejneger, Auk, i, 1884, 231.— Chapman, Bull. Am. 

 Mus. N. H., X, 1898, 25 (Jalapa, Vera Cruz). — American Ornithologists' 

 Union Committee, Auk, xvi, 1899, 123. 



Sylraiiia pusilla NuTTALL, Man. Orn. U. S. and Can., 2d ed., i, 1840,335, part. — 

 American Ornithologists' Union, Check List, 1866, no. 685, part. — (?) Fer- 

 rari-Perez, Proc. U. S. Nat. Mus., ix, 1886, 137 (Puebla and Huexotitla, 

 Puebla,Oct., Nov.; Jalapa, Vera Cruz, Sept. ). — RiDc;\VAv,Orn. Illinois, i, 1889, 

 175.— CooKE, Bird ]\ligr. Miss, ^'al., 1888, 261 (Mississippi Valley localities 



^ Nineteen specimens. ^ Ten specimens. 



