144 DWIGHT 



September 28 (Amer. Mus. Nat. Hist., No. 29020), is still in 

 much worn nuptial dress ; also a bird without date from Guate- 

 mala (No. 42767). 



6. Adult Nuptial Plumage acquired by wear or possibly 

 by partial renewal of the body plumage. 



Ftinalc. — The sexes are alike in plumages and moults. 



Contopus virens (Linn.). Wood Pewee 



1. Natal Down. No specimen seen. 



2. Juvenal Plumage acquired by a complete postnatal moult 



Above, including sides of head olive-brown, much darker on the pileum, the 

 feathers of the crown and rump faintly edged with pale russet and those of the 

 nape with ashy gray, producing a distinct collar. Wings and tail clove brown, 

 wing coverts edged with ochraceous buff, at tips of median and greater coverts 

 producing two wing bands. Below, pale primrose-yellow, sides of throat, 

 flanks and an indistinct olive-gray pectoral band. Bill black, under mandible 

 wood-brown dusky at tip and edges, paler in spring. Feet sepia, nearly black 

 when older. 



3. First Winter Plumage acquired probably by a partial 

 postjuvenal moult beginning early in September. Resembles 

 closely the previous dress, but grayish instead of brownish 

 tinged above, the edgings and collar lost and the new wing- 

 bands grayish. The juvenal plumage persists in specimens 

 taken near New York city, September 30, in North Carolina 

 October 5 and 17, and Guatemala is reached with brown wing 

 bands as proved by an undated specimen (Am. Mus. Nat. Hist., 

 No. 42273). 



4. First Nuptial Plumage acquired by wear which is never 

 marked in this species. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult chiefly or wholly after the birds have migrated 

 southward. A very few new body feathers begin to appear 

 towards the end of August, and a worn adult from Guatemala, 

 undated (Am. Mus. Nat. Hist, No. 42771), shows that migra- 

 tion may precede moult in this species. 



6. Adult Nuptial Plumage acquired by wear which is in- 

 significant even up to the end of the breeding season. 



Female. — The sexes are alike in plumages and moults. 



