'20-2 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Group 3. Wing, 2.75 to 3.25 inches long. 



^ Bill, flat and wide, with small hook at tip» and 

 black bristles at base. 



Winj;, under 3.05; under mandible, yellowisli white; throat and underparts, 

 pale greenish yellow ; l)ack, olive green. 



Yellow=bellied Flycatcher. 



Empidonax flaviventris. 

 See Xo. 352. 



Wing, usually under 3.05; under mandible, 5n!llo\vish wliite ; throat, white ; 

 Itreast and Itclly, whitisli, faintly tinged with yellow: back, dull olive green. 



Arcadean Flycatcher. 



-E"*)); * idi >nax r iresce u n . 

 See No. 353. 



Wing, nndrr 3.05; upper parts, tinged with olive brown ; Mir(»al, whit<'; under 

 niandildc, ytdlowish while; eye-ring and wing bars, pale tawny. 



Traill's Flycatcher. 



Empidonax trailli alnorum. 

 See No. 354. 



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