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 tht 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 invhaving the under 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 differs 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- 
lum deep yellow. 
The bill in chrysopareia 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. Chin 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 - . . A . . - ° . virens. 
