424 WOOD WARBLERS 



GENUS GEOTHLYPIS. 



General Characters. Bill slender, its greatest depth less than half the 

 distance from nostril to tip ; tail rounded or 'graduated, or with basal two 

 thirds hidden by coverts. 



KEY TO ADULT SPRING MALES. 



1. Head, neck, and chest gray. 



2. Lores black ; a distinct white spot on each eyelid. Western. 



tolmiei, p. 424. 

 2'. Lores not black ; a continuous white orbital ring 1 . Eastern. 



agilis, p. 424. 

 1 '. Head, neck, and chest mainly yellow ; sides of head black. 



2. Bill slender, its greatest depth much less than half its length from 



nostril. 



3. Larger, with wider frontal band . . . occideiitalis, p. 425. 

 3'. Smaller, with narrower frontal band. Pacific coast region. 



arizela, p. 426. 



2'. Bill very stout, its greatest depth much more than half its length 

 from nostril. Rio Grande Valley, Texas . . . ralphi, p. 426. 



Subgenus Oporornis. 



Wings pointed, longer than tail ; tail nearly even, more than basal half 

 concealed by coverts. 



678. Geothlypis agilis (Wils.). CONNECTICUT WARBLER. 



Adult male in spring and summer. Head, neck, and chest ash gray ; 

 eye with conspicuous white ring ; gray of chest sharply contrasting with 

 yellow of under parts ; sides and flanks olive green ; back dark olive green. 

 Adult female in spring and summer : similar, but top of head uniform with 

 back; throat and breast brownish. Adult male in fall and winter: like 

 summer male, but gray of forehead and crown tinged with brown, and 

 feathers of throat and chest tipped with paler. Young male in first fall 

 and winter : like adult female, but crown brownish olive, and chest darker, 

 more olivaceous. Young female in first fall and winter: like young male, 

 but smaller, and with throat and chest more strongly tinged with brownish 

 buffy. Male: length (skins) 5.00-5.42, wing 2.79-2.97, tail 1.84-2.08, bill 

 .45-.40. Female : length (skins) 4.80-5.81, wing 2.65-2.83, tail 1.84-1.94, 

 bill .4G-.47. 



Distribution. Eastern North America, breeding in Manitoba and Onta- 

 rio ; migrating to northern South America ; accidental in Colorado. 



Nest. On ground in swampy woods ; very compact. Eggs : 4, white or 

 creamy, spotted with lilac gray and shades of brown. 



Subgenus Geothlypis. 

 Wings short and much rounded ; tail rounded. 



680. Geothlypis tolmiei (Towns.). MACGILLIVRAY WARBLER. 



Adult male in spring and summer. Head, throat, and breast slate gray ; 

 throat feathers edged with ash ; rest of under parts yellow ; lores deep 

 black ; eyelids with distinct white spots ; back olive green, sometimes 

 tinged with gray. Adult female in spring and summer: like adult male, 

 but crown, hind neck, and sides of head and neck mouse gray, fading to 

 pale grayish or grayish white on throat and breast. Adult male in fall 



