358 CHECK-LIST OF NOBTH AMERICAN BIRDS. 



b. Polioptila cserulea obscura Ridgway. Western Gnatcatcher. [751a.] 



Polioptila ccerulea obscura Ridgway, Proc. U. S. Nat. Mus., V, 1883, 535 

 (note). (San Jos6 del Cabo, Lower California.) 



Range. — Western United States and Mexico. Breeds in Upper and 

 Lower Sonoran zones from Siskiyou County, California, southern Nevada, 

 southern Utah, and Colorado south to the Cape Region of Lower California, 

 and on the tableland of Mexico to Guanajuato, and east to Pecos River, 

 Texas; winters from southern California and southern Arizona south to Cape 

 San Lucas, Colima, Morelos, and Puebla. 



Polioptila plnmbea (Baird). Plumbeous Gnatcatcher. [752.] 



Culicivora plumbea Baihd, Proc. Acad. Nat. Sci. Phila., VII, 1854, 118. 

 (Bill Williams Fork [Big Sandy River, Lat. 34° 32' N., Long. 113° .30' 

 W.], Arizona.) 



Range. — Lower Sonoran Zone from southeastern California, 

 southern Nevada, central Arizona, west central New Mexico, and the 

 Rio Grande Valley south to Cape San Lucas, Sonora, Nuevo Leon, 

 and Tamaulipas. 



Polioptila califomica Brewster. Black-tailed Gnatcatcher. [753.] 



Polioptila californica Brewsteb, Bull. Nuttall Om. Club, VI, April, 

 1881, 103. (Riverside, San Bernardino Co., California.) 



Range. — Southern and Lower California. Breeds mainly in Upper 

 Sonoran Zone from Ventura County south in Lower California to San 

 Fernando; in winter to Espiritu Santo Island; casual east to Fort 

 Yuma. 



Family TURDIDiE. Thrushes, Solitaires, Stonechats, 

 Bluebirds, etc. 



Subfamily MTADESTINiE. Solitaires. 



Genus MTADESTES Swainson. 



Myadestes Swainson, Nat. Libr., XIII, Flycatchers, 1838, 132. Type, 

 by monotypy, Myadestes genibarbis Swainson. 



