472 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



anteriorl}') ; under tail-coverts lemon yellow; under wing-coverts and 

 axillars dull white; rest of under parts dull white medially shading 

 into pale smoke gray laterally; maxilla dusky horn color with paler 

 tomia; mandible paler horn color (more bluish in life); iris brown; 

 legs and feet dusky horn color in dried skins. 



Adult male in autumn and winte7\ — Similar to the summer male 

 but strongly tinged with brown above and on flanks, yellow of chest 

 duller, and chestnut crown-patch concealed b}" very broad brownish 

 gray tips to the feathers. 



Adult female in spring and summei'. — Similar in coloration to the 

 adult male but colors duller, especially the yellowish olive-green of 

 rump and upper tail-coverts; chestnut crown-patch usually more 

 restricted, sometimes nearly obsolete; gray of back, etc., browner; 

 yellow of chest paler and never (?) extended over throat; that of the 

 under tail-coverts also paler. 



Yowig {'i) female in first autumn} — Similar to the adult female, but 

 under parts pale buffy or buffy whitish medially, the chest only very 

 faintly, if at all, tinged with yellow. 



Young in first plumage. — Middle and greater wing-coverts tipped 

 with pale dull ])ufty, forming two rather distinct bars; chin, throat, 

 chest, and sides of breast pale brownish-gray, the sides and flanks sim- 

 ilar, but still paler; mediau portion of breast and abdomen white; 

 otherwise like autumnal adults or young in first autumn. 



Adidt rnale.—ljQwgth (skins), 103.6-109.2 (106.4); wing, 61-61.5 

 (61.2); exposed culmen, 8.9-9.9 (9.4); tarsus, 16-17.8 (17).' 



Adult female.— IjQwgth (skins), 101.6; wing, 57.4-60.4 (58.9); tail, 

 45.5-46.7(46); exposed culmen, 9.4; tarsus, 17.3.^ 



Rocky Mountain district of United States, from Colorado and 

 Wyoming to Nevada, southward through central and western Mexico 

 to States of Guanajuato and Jalisco (Bolanos); breeding in higher 

 mountains. (Southern limit of breeding range unknown.) 



Helminihophaga virginix Baird, Cat. N. A. Birds, 1859, no. 183a {nomen nudum); 

 Birds N. Amer., 1860, Atlas, p. xi, footnote, pi. 79, tig. 1 (Fort Burgwyn, New 

 Mexico; coll. U. S. Nat. Mus. ); Review Am. Birds, 1865, 177. — Coues, Proc. 

 Acad. Nat. Sci. Phila., xviii, 1866, 70 (Fort Whipple, Arizona); Check List, 

 1873, no. 66; 2d ed. 1882, no. 105; BirdsN. W., 1874, 51; Birds Col. Val., 1878, 

 222.— Cooper, Orn. Cal., 1870, 85 (Prescott, Arizona; Fort Burgwyn, New 

 Mexico) .—Aiken, Proc. Bost. Soc. N.H.,xv, 1872, 196 (El Paso Co., Colorado; 

 descr. nest and eggs). — Ridgway, Bull. Essex Inst., v, 1873, 172 (Salt Lake 

 City, Utah, breeding), 180 (Colorado); vii, 1875, 20 (East Humboldt Mts., 

 Nevada), 32 (Wahsatch Mts., Utah); Ibis, 1876, 170; Orn. 40th Parallel, 1877, 

 428; Nom. N. Am. Birds, 1881, no. 84. — Baird, Brewer, and Ridgway, Hist. 

 N. Amer. Birds, i, 1874, 199, pi. 11, fig. 12; iii, 1874, 504.— Hensh.^w, Zool. 



'This plumage may in reality represent that of the adult female in autumn. 

 ^ Four specimens. 

 *Two specimens. 



