ORDER PASSERIFORMES. ' 209 



California and Colorado. Winters from northern Mexico to the highlands of 

 Guatemala. 



Empidonax wrighti Baird. Wright's Flycatcher. [469.] 



Empidonax urightii BArRD, in Baird, Cassin, and Lawrence, Rep. Expl. 

 and Surv. R. R. Pac, IX, 1858, 200. (El Paso, Texas.) 



Range. — Breeds in the Transition and Canadian zones from central British 

 Columbia, Yukon (casually), and west-central Saskatchewan south to southern 

 California, Arizona, New Mexico, and western Texas, and east to the eastern 

 base of the Rocky Mountains. Winters from northern Mexico to Guatemala. 



Empidonax griseus Brewster. Gray Flycatcher. [469.1.] 



Empidonax griseiis Brewster, Auk, VI, No. 2, AprU, 1889 (separates 

 publ. Jan. 31), 87. (La Paz, Lower California.) 



Range.— Breeds in the Great Basin from northeastern Colorado to eastern 

 Oregon and extreme eastern California. Winters from southern California 

 and southern Arizona south in Lower California and Mexico to Puebla and 

 Nayarit. 



Empidonax difficilis difficilis Baird. Western Flycatcher. [464.] 



Empidonax difficilis Baird, in Baird, Cassin, and Lawrence, Repl. Expl. 

 and Surv. R. R. Pac, IX, 1858, xxx, 198. (West coast; Ft. Steilacoom, 

 Ft. Tejon = Fort Tejon, California.) 



Range. — Breeds from Glacier Bay, Alaska, southeastern British Columbia, 

 Montana, and southwestern South Dakota to southern California and western 

 Texas. Winters in Mexico south to Cape San Lucas, the Tres Marias Islands, 

 and Oaxaca. 



Empidonax difficilis cineritius Brewster. San Lucas Flycatcher. [464a.] 



Empidonax cineritius Brewster, Auk, V, No. 1, Jan., 1888, 90. (La 

 Laguna [ = Sierra de la Laguna], Lower California.) 



Range. — Breeds in the mountains of the Cape district of Lower California 

 north to the Sierra San Pedro Martir. 



[An additional race of E. difficilis occurs in Mexico.] 



Empidonax fulvifrons pygmaeus CouES. Buff-breasted Flycatcher. [470o.] 



Empidonax pygmaeus Coues, Ibis, n. s. [= ser. 2], I, No. 4, Oct., 1865, 

 537. (Fort Whipple, Arizona.) 



Range. — Breeds in the mountains of southern Arizona, New Mexico, and 

 Chihuahua to Sinaloa and Durango. Winters south of the United States to 

 Jalisco, Nayarit, Morelos, and Michoacan. [Closely allied races occur in 

 Mexico.] 

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