146 DWIGHT 



Empidonax virescens (Vieill.). GREEN- CRESTED FLYCATCHER 



1. NATAL DOWN. No specimen seen. 



2. JUVENAL PLUMAGE acquired by a complete postnatal moult. 



Above, including sides of head and neck olive-green, the crown feathers darker 

 centrally, the pileum not darker than the back. Wings and tail deep olive- 

 brown, median and greater wing coverts edged with rich buff forming two wing 

 bands, edgings of secondaries and tertiaries paler buff. Below, pale greenish 

 sulphur-yellow, the chin white, a faint olive-gray pectoral band. Bill black, 

 the lower mandible pinkish buff. Feet sepia, nearly black when older. 



3. FIRST WINTER PLUMAGE acquired apparently by an in- 

 complete postjuvenal moult. Young and old pass south before 

 moulting as indicated by birds taken near New York up to 

 September 19. I have seen no specimens from southern 

 latitudes. 



4. FIRST NUPTIAL PLUMAGE acquired by wear. Light wing 

 bands and greener plumage are acquired during the winter ab- 

 sence. 



5. ADULT WINTER PLUMAGE acquired by a complete post- 

 nuptial moult probably after the birds have reached winter 

 quarters. 



6. ADULT NUPTIAL PLUMAGE acquired probably by wear, 

 which at all seasons seems to be insignificant. 



Female. The sexes are alike in plumages and moults. 



Empidonax traillii alnorum (Brewst.). ALDER FLYCATCHER 



1. NATAL DOWN. Pale olive -brown. 



2. JUVENAL PLUMAGE acquired by a complete postnatal moult. 



Above, including sides of head and lesser coverts olive-brown, pileum darker and 

 in contrast (usually) with the back, the crown feathers darker still centrally. 

 Wings and tail deep olive-brown, median and greater wing coverts edged with 

 rich buff forming two distinct wing bands ; secondaries and tertiaries edged 

 with pale buff. Below, dull white, usually tinged with pale sulphur-yellow on 

 crissum and sides of abdomen ; an olive-gray wash on sides of breast and flanks 

 and across jugulum where it forms an indistinct pectoral band slightly tinged 

 with buff. Buffy orbital ring. Bill black, the lower mandible pinkish buff. 

 Feet sepia, nearly black when older. Some specimens are wholly ashy every- 

 where below without yellow tinge. Differs from E.JIaviventris and E. vires- 

 c ens in being browner above, the head dark in contrast. 



