BIKDS OP NOETH AND MIDDLE AMERICA. 631 



[Oeolhlypis Philadelphia] var. Philadelphia Baird, Brewer, and Ridgway, Hist. 



N. Am. Birds, i, 1874, 297. 

 [QeoMypis Philadelphia] a. Philadelphia Cov^s, Birds N.W., 1874, 75 (synonymy). 

 S[durus] Philadelphia Ridgway, Ann. Lye. N. Y., x, Jan., 1874, 369 (Illinois). 

 Opm-omis agilis (not Sylvia agilis Wilsoji) Woolsey, Bull. Nutt. Orn. Club, v, 



1880, 117 (New Haven, Connecticut, May 12; see Allen, Bull. Nutt. Orn. 



Club, vi, 1881, 114).— Merrill, Bull. Nutt. Orn. Club, vii, 1882, 190 (Ebeme 



Lake, Maine, Aug.; see Merrill, Auk, iii, 1886, 413). 



OPORORNIS TOLMIEX (Townsend). 

 UACGILLIVRAT'S WARBLER. 



Similar to 0. Philadelphia, but tail decidedly longer, and with a 

 white bar on each eyelid (in both sexes). 



Adult male in spring and summer. — Head and neck slate color, deep- 

 ening into black on lores and rictal region; a conspicuous spot of 

 white on each eyelid, smaller and more posterior on the upper; chin 

 sometimes white (more or less extensively); throat and chest darker 

 slate or slate-blackish, but the feathers more or less distinctly mar- 

 gined with pale gray or grayish white, never forming a "solid" black 

 patch on chest as in 0. Philadelphia; upper parts (except pileum and 

 hindneck) plain olive-green, duller (sometimes slightly tinged with 

 gray) on back and scapulars; outer web of outermost primary edged 

 with white; under parts of body clear lemon j'^ellow, becoming yellow- 

 ish olive-green on sides and flanks; maxilla dusky brown or brownish 

 black with paler tomia; mandible pale brownish (in dried skins); iris 

 brown; legs and feet light brownish (in dried skins). 



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

 mer plumage, but feathers of pileum and hindneck (especially the lat- 

 ter) indistinctly tipped with brown, and pale gray or grayish white 

 margins of feathers of throat and chest broader, sometimes almost 

 concealing the blackish centers. 



Young (?) male in first autum^i. — Similar to the adult male of corre- 

 sponding season, but pileum and hindneck duller and more brownish 

 slate or slate-gray, lores light gray (dasky only next to eye), and throat 

 and chest pale gray or dull grayish white, the feathers with concealed 

 central spots of dark slate color. 



Adult female in spring and summer. — Pileum, hindneck, and sides 

 of head and neck mouse gray, fading into pale gray or dull grayish 

 white on chin, throat, and chest; a distinct white mark on each eyelid, 

 as in the adult male; rest of plumage as in adult male. 



Adult female in autumn and winter. — Similar to the spring and 

 summer livery, but plumage softer, and sides of throat and chest more 

 grayish. 



Young female in first autumn.— ^imilBX to the adult female of cor- 

 responding season, but pileum and hindneck nearly concolor with 

 back, etc., instead of grayish; chin, throat, and chest yellowish instead 



