268 DWIGHT 



lemon-yellow, bordered with black which extends to auriculars, lores and fore- 

 head. Superciliary stripe white, anteriorly tinged with lemon-yellow ; white 

 postauricular patch. Wing coverts black, the greater and middle tipped with 

 dull white forming two wing bands. 



4. First Nuptial Plumage acquired by wear which is con- 

 siderable, birds becoming much grayer above and clearer white 

 below. Young birds have browner and more worn primary 

 coverts than do adults. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult, beginning near Washington, D. C, late in July. 

 Adults are grayer above with more black on the head and 

 whiter below, while the primary coverts are blacker than in 

 young birds. Young and old now become absolutely indistin- 

 guishable. 



6. Adult Nuptial Plumage acquired by wear. 



Female. — The plumages and moults correspond to those of 

 the male, females, however, being duller in colors, much washed 

 in autumn with brown above and below, and the black about 

 the head dull. 



Dendroica virens (Gmel.). Black-throated Green Warbler 



1. Natal Down. Sepia-brown. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, sepia-brown or drab. Wings and tail dull black, edged with ashy or olive 

 gray ; two wing bands white ; the outer three rectrices largely white. Below, 

 dull white, dusky on the throat, spotted on the breast and sides with dull olive- 

 brown. Indistinct grayish white superciliary line. Dusky transocular streak. 

 Bill and feet pinkish buff becoming black with age. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult, beginning the middle of July, which involves the body 

 plumage and wing coverts, but not the rest of the wings nor the 

 tail. 



Unlike the previous plumage. Above, greenish olive-yellow, the upper tail coverts 

 ashy or plumbeous gray edged with olive-yellow. The feathers of the crown 

 and back especially have concealed black shaft streaks. The wing coverts 

 are black, edged with olive-green ; two broad white wing bands tipped faintly 

 with yellow. Below, faint primrose-yellow, white on the crissum ; the breast 

 and a spot on the flanks canary, the chin, sides of head and neck and super- 



