184 REVIEW OF AMERICAN BIRDS. [PART I. 



(229, Salvin collection.") Head and body above black, the feathers with 

 olive-green edges, especially on the back, obscuring the ground color ; rump 

 clear black. Entire side of head (extending to nostrils and on lower jaw), 

 and the partially concealed bases of the feathers on the median line of the 

 forehead, yellow, with a narrow black line from lores, through the eye, widen- 

 ing behind, but not crossing through the yellow. Beneath, including inside 

 of wings, white; a large patch of black covering the chin and throat, and 

 occupying the entire space between th'e yellow patches of the two sides of the 

 head and neck, and extended along the sides in a series of streaks. Feathers 

 of crissum with black centres. Wings above ashy, with two white bands 

 across the coverts, the scapulars streaked with blackish ; first quill edged 

 externally with white, the rest with gray. Tail feathers blackish, edged ex- 

 ternally with ashy, the lateral with white at the base. Outer tail feather 

 white on the inner web, except a stripe along the shaft near the end ; second 

 similar, but the white not reaching so far towards the base ; third with a 

 short patch of white in the end. Bill and legs brownish-black. 



Length, 4.50; wing, 2.50; tAil, 2.40 ; tarsus, 2.75. 



This species agrees with virens and occidentalis, to which it is 

 closely related in having the undei* parts white, with a black patch 

 on the chin and throat. The prevailing black of the upper part, 

 especially of the head and rump, will. easily distinguish it from both 

 these species. The black stripe through the eye (wanting in occi- 

 dentalis) is better defined than in virens, but there is no trace of an 

 obscure dusky crescent below the eye. D. townsendii diifers in a 

 much broader patch of black through the eye, with a yellow crescent 

 in it beneath the eye ; a much more olivaceous-green back, with 

 ashy rump ; the black of the head obscured by green, and the jugu- 

 lura deep yellow. 



The bill in chrijsopareia is much thicker than in any of the allied 

 species. 



The following diagnosis may serve to distinguish the allied species 

 of Warblers with black chins and throat (excluding D. nigrescens, 

 which is black, white, and gray, with only a small yellow loral spot) : — 

 Common Characters. — Upper parts more or less olivaceous- 

 green, with the feathers streaked centrally with black 

 (sometimes concealed). Sides of head yellow. Cliin and 

 throat black ; rest of the under parts, including inside 

 of wings, white, with or without yellow on breast. Wings 

 with two white bands. Inner web of lateral tail feather 

 almost entirely white from the base. 

 Above bright olive-green, with concealed black streaks ; tail 

 coverts ashy. Sides conspicuously streaked with black ; 

 crissum unspotted. Jugulum sometimes faintly tinged 

 with yellowish. An obscure dusky olive stripe through 

 the eye, and a crescentic patch of the same some distance 

 beneath it , . virens. 



