SYLVICOLIDiE — THE WARBLERS. 2 7 
Bacttdnd sides not streaked with black ; abdomen yellow. 
Yellow of throat extending back to the crissum ; snpra-loral 
stripe as in the last; dorsal streaks wanting. Wing, 2.10 ; tail, 1.95. 
Hab. Porto Rico. (Adelaide's Warbler.) . . . var. a del a idee. 
Series VII. 
Throat black in mixed with black in 9 . 
A. Sides streaked ; black of throat with its posterior outline concave. 
a. Side of head white and black. 
19. D. nigrescens. A small yellow spot over the lore ; above ash ; be- 
neath white. $. Whole crown uniform glossy black; back streaked 
with black. 9 • Crown ash streaked with black throat mixed with white 
anteriorly. Juv. Crown and cheeks ashy ; throat mostly white ; back 
without streaks. Hab. Western and Middle Province of United States, 
south, in winter, into Western Mexico (Oaxaca). ( Black-throated Gray 
Warbler.) 
b. Side of head yellow and black, or yellow and olive. 
Black of throat covering jugulum ; a hidden yelloiu spot in middle of forehead. 
20. D. chrysopareia. Black above, pure white below ; no tinge of yel- 
low behind the black jugular patch. Hab. Eastern Middle America, 
from G-uatemala to Texas (San Antonio). ( Golden-cheeked Warbler.) 
21. D. virens. Olive-green above, the crown and back without streaks ; 
beneath white, the breast and anal region tinged with black. Hab. 
Eastern Province of North America, from Greenland to Panama ; Cuba ; • 
Oaxaca ; Heligoland, Europe. (Black-throated Green Warbler.) 
Black of throat confined anteriorly to the jugulum; no yellow spot on forehead. 
22. D. townsendi. Above olive-green, the crown and back with con- 
spicuous black streaks ; beneath yellow anteriorly, and white posteriorly. 
9 , black of throat mixed with yellow ; juv., no black on throat, and 
streaks on back obsolete. Hab. North and Middle Province of United 
States, south, in winter, into G-uatemala. ( Townsend's Warbler.) 
II® Sides not streaked ; black of throat with its posterior outline convex. . 
23. D. occidentalis. Above ash tinged with olive ; beneath white. 
Head nearly all yellow. $. Top of head yellow with a few small 
black spots; nape black; back streaked with black ; sides pure white. 
(9 not seen.) Juv . Yellow of crown overlaid by olive ; above green- 
ish-plumbeous, without any black on nape or back ; throat yellowish- 
whitish; sides tinged with ashy. Hab. Western and Middle Province 
of United States, south to G-uatemala. (Western Warbler.) 
Group C. 
A® Above ash ; no supra-loral stripe ; eyelids not yellow. 
24. D. 3?irtlandi. Above, including side of head and neck, bluish-ash; 
Crown and back streaked with black ; beneath (except crissum) pale yel- 
low ; breast speckled, and sides streaked with black ; lores and orbital 
region, black; eyelids white. Hab. Eastern Province of United States 
(Cleveland, Ohio), and Bahamas. (Rirtland's Warbler.) 
