202 



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. 



Wing, under 3.05 ; under mandible, yellowish white ; throat and underpants, 

 pale greenish yellow ; back, olive green. 



Yellow-bellied Flycatcher. 



Empidonax flaviventris. 

 See No. 352. 



Wing, usually under 3.05 ; under mandible, yellowish white ; throat, white ; 

 breast and belly, whitish, faintly tinged with yellow; back, dull olive green. 



Arcadean Flycatcher. 



Empidonax rirescens. 

 See No. 353. 



Wing, under 3.05; upper parts, tinged with olive brown ; throat, white; under 

 mandible, yellowish white ; eye-ring and wing bars, pale tawny. 



Traill's Flycatcher. 



Empidonax trailli alnorum. 

 See No. 354. 



