172 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Wing, usually under 3.05 ; under mandible, straw color or yellowish 

 white; throat, white; belly, whitish, faintly tinged with yellow; 

 back, olive green; first primary, about as long as fifth. 



Empidonax virescens. 

 Green-crested or Acadian Flycatcher. 

 See No. 213. 



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

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

 tawny; first primary, shorter than fifth. Empidonax traillii, and races. 



Traill's Flycatcher. 



See Nos. 214, 



GROUP 4. Wing, 3.25 to 3.75 inches long. 



Both mandibles, blackish; back brownish olive, 

 under tail coverts, pale yellowish white. 



Sayornis phcebe. 

 Phrebe Flycatcher. 



See No. 207. 



Wood Pewee. 



Wing, longer than the tail; under mandible, pale, usually yellow- 

 ish, or yellowish brown; back, dull olive; breast and sides, olive gray. 



Myiochanes virens. 

 Wood Pewee. 

 See No. 210. 



