BIRDS OF NORTH AND MIDDLE AMERICA. 631 



IGeothlypis Philadelphia'] var. Philadelphia Baird, Bke\v'er, and Ridgway, Hist. 



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

 \_Geothlypis Philadelphia'] a. Philadelphia Coues, Birds N.W., 1874, 75 (synonymy). 

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

 Oporornis agilis (not Sylvia agilis Wilson) 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 TOLMIEI (Townsend). 

 MACGILLIVRAY'S WARBLER. 



Similar to 0. i^Mladelphia^ ])ut tail deeidedl}^ 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 O. 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 l)ody clear lemon j^ellow, becoming yellow- 

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

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

 brown; legs and feet light In-ownish (in dried skins). 



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

 mer plumage, but feathers of pileum and hindneck (especiall}' the lat- 

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

 margins of feathers of throat and chest ])roader, sometimes almost 

 concealing the blackish centers. 



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

 sponding season, but pileum and hindneck duller and more brownish 

 slate or slate-gray, lores light gray (dusky 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 lointer. — Similar to the spring and 

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

 grayish. 



Young female in first atttumn. — Similar 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 



