626 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



chin and upper throat, deeper (sometimes ahiiost slate color) on chest; 

 rest of under parts pale yellow (intermediate between canary 3'ellow 

 and straw yellow, the sides and tlanks light olive-green; upper parts 

 (except forehead and crown) plain olive-green, the outer web of outer- 

 most primary edged with whitish; maxilla dark brownish, with paler 

 tomia; mandible pale brownish (in dried skins), darker terminally; iris 

 brown; legs and feet pale yellowish brown in dried skins (pale llesh 

 color in life?). 



Adult male in autumn and winter. — Similar to the spring and sum- 

 mer plumage, but gra}^ of forehead and crown tinged with brown, and 

 feathers of throat and chest indistinctl}^ tipped with paler gray. 



Adult female in spring and summer. — Similar to the adult male, but 

 slate color of head replaced by grayish olive, olive, oi* l)rownish olive, 

 that of chin and throat by pale brownish buffy or dull ])rownish white, 

 that of chest by a deeper shade of the same color as chin and throat. 



Young male in first autmnn and winter. — Similar to the adult female, 

 but with color of pileum browner than in most examples of that sex 

 (brownish olive) and color of chest darker, more olivaceous. 



Young female in first a,utu'mn and uilnter. — Similar to the y<Hing 

 male of corresponding season, but smaller and with the throat and 

 chest more strongly tinged with brownish buli'y. 



Adidt male.— L^n^ih (skins), 127-187.7 (1:33.1); wing, 70.9-75.4 

 (73.1); tail, 46.7-52.8 (49.8); exposed culmen, 11.4-12.4 (11.9); tarsus, 

 20.6-23.1 (21.3); middle toe, 13.2-14.7 (14. 2). ^ 



Adult female.— Length (skins), 121.9-147.3 (134.4); wing, 67.3-71.9 

 (69.3); tail, 46.7-49.3 (48); exposed culmen, 11.7-11.9 (11.8); tarsus, 

 19-21.8 (20.8); middle toe, 13.. 5-14 (13.9).' 



Eastern United States and British Provinces; north to Maine (Saco), 

 New Hampshire (Shelburne), Vermont (Pittsford), Ontario, Michigan, 

 and Manitoba; west to Minnesota and (casually) Colorado (Lincoln 

 County, Ma}' 24); breeding in Ontario'( O, Minnesota (Aitkin County) ?, 

 and Manitoba (Duck Mountain); in winter, south to Bahamas (Ca}' Sal, 

 May 7), Colombia (Bonda, province of Santa Marta, October 22), and 

 upper Amazon Valley (Tonantins, April 9). (No other extralimital 

 records?) 



^yh'iu fujUis WiLsos, Am. Orn., v, 1812, 64, pi. 39, fig. 4 (Connecticut; Pennsyl- 

 vania near Philadelphia).— Stephens, Shaw's Gen. Zool., x, 1817, 732 — 

 ViEiLLOT, Enc. Mcth., ii, 1823, 448.— Bo.vaparte, Journ. Ac. Nat. Sci. Phila., 

 iv, 1824, 199; Ann. Lye. N. Y., ii, 1826, 84.— Audubon, Orn. Bio<j;., ii, 1834, 

 227, pi. 138. 



Silvia agilis Cabot, Proc. Bost. Soc. N. H., ii, 1845, 60 (Broukline, Massachu- 

 setts.) 



Trichas agilis Nuttall, Man. Orn. U. S. and Can., 2d ed., i, 1840, 463.^Hoy, 

 Proc. Ac. Nat. Sci. Phila., vi, 1853, 312 (Wisconsin).- Read, Proc. Ac. Nat. 

 Sci. Phila., vi, 1853, 399 (Ohio).— Kennicott, Trans. Ills. Agric. Soc, i, 1855, 

 583 (Illinois). 



' Seven specimens. ^ Five specimens. 



