164 



KEY AND DESCRIPTION 



11. Western "Wood Pewee (462. Contdjms richay-dsdnii). — 

 This is a bird similar to the last, but darker and less olive- 

 tinted on the back, with more of olive-gray across the breast, 

 and less of yellowish on the belly. 



Length, Q\ ; wing, 3| (3i-3|) ; tail, 2f ; tar.?us, ] ; cuhnen, |. Western 

 United States from the Plains to the Pacific, north to British Columbia, 

 and south in winter to northern South America. 



12. Yellow-bellied Flycatcher (IGo. Empiddnax flaviv^ntns). 

 — A small, dark olive-green-backed, yellow-bellied flycatcher, 



with the yellow breast, sides, and 

 throat washed with much olive-green. 

 The wings and tail are blackish, and 

 the two wing bars whitish. Tliis has 

 more sulphur-yellow on the lower 

 parts than any other of our fly- 

 catchers. No other eastern species 

 has yellow of any shade on the 

 throat. It is practically only a mi- 

 grant in the United States, and dur- 

 ing migrations is almost voiceless. 

 In its summer home in the northern 

 evergreen forests its rather plain- 

 tive call as well as its harsh, abrupt 



^' pse-ek^^ can be heard. 

 Yellow-bellied Flycatcher 



Length, b\ ; wing, 2% (2|-23) ; tail, 2> ; 



tarsus, I ; culmen, \. North America from the Plains eastward; breed- 

 ing from the northern border of the I'nited States to Labrador, and 

 wintering from eastern Mexico to the Isthmus. The Western Flycatcher 

 (404. Empiilnnux di_fficiUs) of the western United States from tlif Plains 

 to the Pacific is very much like the last, but less yellow below, and with 

 buffy wing bars. The tail averages 2|. 



13. Green-crested Flycatcher (465. Empiddnax virhcens). — A 

 slightly crested, dull-greenish-olive flycatcher, with the lower 

 parts yellowish-white, and the distinct wing bars also yellowish- 

 white. The breast has a slight tinge of green, the throat is 

 white, and the wings and tail are blackish. The upper mandible 



