358 CHECK-LIST OF NORTH AMERICAN BIRDS. 
b. Polioptila cerulea obscira Ripaway. Western Gnatcatcher. [75la.] 
Polioptila cerulea obscura Ripaway, Proc. U. 8. Nat. Mus., V, 1883, 535 
(note). (San José del Cabo, Lower California.) 
RancE.— 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 pliambea (Barrp). Plumbeous Gnatcaicher. [752.] 
Culicivora plumbea Batrp, Proc. Acad. Nat. Sci. Phila., VII, 1854, 118. 
(Bill Williams Fork [Big Sandy River, Lat. 34° 32’ N., Long. 113° 30’ 
W.], Arizona.) 
RancE.— 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 californica Brewster. Black-tailed Gnatcatcher. [753.] 
Polioptila californica Brewster, Bull. Nuttall Orn. Club, VI, April, 
1881, 103. (Riverside, San Bernardino Co., California.) 
RanGEe.— 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. 
Famity TURDIDA. 'THRUSHES, SOLITAIRES, STONECHATS, 
BLUEBIRDS, ETC. 
SuBFAMILY MYADESTINZA. So.iratrres. 
GENUS MYADESTES Swainson. 
Myadestes Swatnson, Nat. Libr., XIII, Flycatchers, 1838, 132. Type. 
by monotypy, Myadestes genibarbis SwWAINnson. 
