626 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



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

 rest of under parts pale yellow (intermediate between canary yello\i 

 and straw yellow, the sides and flanks 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 palei 

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

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

 color in life?). 



Adult m,al6 in autumn arid winter. — Similar to the spring and sum- 

 mer plumage, but gray of forehead and crown tinged with brown, and 

 feathers of throat and chest indistinctly 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, or brownish olive, 

 that of chin and throat by pale brownish bufl:y or dull brownish white, 

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



Young male in first autumn 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. 



YcniThg female in first autumn and winter. — Similar to the young 

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

 chest more strongly tinged with brownish buffy. 



Adult mafo.— Length (skins), 127-137.7 (133.1); 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.— L&n^h (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, May 24); breeding in Ontario (?), Minnesota (Aitkin County)?, 

 and Manitoba (Duck Mountain); in winter, south to Bahamas (Cay Sal, 

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

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

 records ?) 



Sylvia agUis Wilson, Am. Orn., v, 1812, 64, pi. 39, flg. 4 (Connecticut; Pennsyl- 

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

 ViEiLLOT, Enc. M6th., ii, 1823, 448.— Bonaparte, Journ. Ac. Nat. Sci. Phila., 

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

 ^227, pi. 138. 



Silvia agilis Cabot, Proc. Bost. Soo. N. H., ii, 1845, 63 (Brookline, Masaachu- 

 setts.) 



Tnchas agilis Nuttall, Man. Orn. V. 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. 



