316 CHECK-LIST OF NORTH AMERICAN BIRDS. 



southern Florida, Bahamas, and Greater Antilles, and also casually north to 

 South CaroUna and in the Lesser Antilles; in migration casually to New York, 

 Massachusetts, and Connecticut. 



b. Dendroica dominica albildra Ridgwat. Sycamore Warbler. [663a.] 



Dendroica dominica var. albilora Ridgway, Amer. Nat., VII, Oct., 1873, 

 606. (Belize, British Honduras.) 



Range. — East central United States to Central America. Breeds in Upper 

 and Lower Austral zones of Mississippi Valley from southeastern Nebraska, 

 southern Wisconsin, southern Michigan, Ohio, West Virginia, and western 

 North Carolina south to eastern Texas and Louisiana; winters from Puebla, 

 Tepic, and Colima, Mexico, to Nicaragua and Costa Rica and casually in the 

 Lower Rio Grande Valley; in migration occasional east to South Carolina. 



Dendroica graciae Baird. Grace's Warbler. [664.] 



Dendroica gracias, Baibd, Review Amer. Birds, 1865, 210. (Fort Whipple, 

 Arizona.) 



Range. — Western North America. Breeds chiefly in Transition 

 Zone in mountains of southern Colorado, Arizona, New Mexico, 

 Sonora, and Chihuahua; winters in Mexico south to Tepic, Jalisco, 

 and Michoacan; casual in migration to central Colorado and western 

 Texas. 



Dendroica nigrescens (J. K. Townsend). Black-throated Gray 

 Warbler. [665.] 



Sylvia nigrescens Townsend, Joum. Acad. Nat. Sci. Phila., VII, 1837, 

 191. (Near Fort William [Portland], Oregon.) 



Range. — Western North America. Breeds in Transition Zone 

 from southern British Columbia, Nevada, northern Utah, and north- 

 western Colorado south to northern Lower California, southern 

 Arizona, and northern New Mexico; winters in southern Lower 

 California, and in Mexico from Durango to Michoacan, Vera Cruz, 

 and Oaxaca. 



Dendroica chrysoparia Sclater & Salvin. Golden-cheeked Warbler. 

 [666.] 



Dendroeca chrysoparia Sclater & Salvin, Proc. Zool. Soc. Lond., 1860, 

 298. (Mountains of Vera Paz, Guatemala.) 



