Appendix. 



Nevada Mountains within our limits. It 

 may be known from the next species by the ab- 

 sence of yellow from the plumage, this color 

 being replaced by white. 



7 1 . Arkansas Kingbird ; Western Kingbird ; 

 Tyrannus verticalis Say. 



A noisy, pugnacious species, aptly called the tyrant 

 flycatcher. Length eight or nine inches. The 

 back is olive-gray; the head and breast clear 

 ashy; the under parts bright yellow. The tail 

 is black with the outer pair of feathers white on 

 outer web; crown with a concealed patch of 

 scarlet, which is wanting in the young. A 

 common summer resident over most of the 

 State. 



72. Cassin's Kingbird ; Tyrannus vociferans 

 Swains. 



Very similar to preceding, from which it may at 

 once be distinguished by the absence of the 

 white outer web of the outer tail-feathers. 

 These feathers are sometimes narrowly edged 

 with whitish or grayish, but never completely 

 so as in the Arkansas kingbird. A southern spe- 

 cies, apparently rare north of Los Angeles 

 County. 



73. Ash-throated Flycatcher; Myiarchus ciner- 

 ascens Lawr. 



Rather similar in general appearance to the king- 

 birds, but no crown-patch and tail and wings 

 largely edged with rufous. Back olive-brownish; 



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