PASSERINE BIRDS OF NEW YORK 277 



4. First Nuptial Plumage acquired by marked wear 

 through which the buff tints are largely lost, the flecks of the chin 

 and the breast streaks diminished. Although specimens from 

 Jamaica, W. I., in December, and from Florida in March, show 

 a few new feathers on the chin, I doubt whether this is more 

 than mere renewal in a species subjected to much wear. It 

 is difficult to draw the line between moult and renewal except 

 by the stud}' of larger series of ^^'inter birds than are now avail- 

 able. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult in July. Practically indistinguishable from the 

 first winter dress. 



6. Adult Nuptial Plumage acquired by wear which is 

 marked. 



Female. — The sexes are indistinguishable and the moults 

 identical. 



Geothlypis formosa (Wils.). Kentucky Warbler 



1. Natal Down. No specimen seen. 



2. JuYENAL Plumage acquired by a complete postnatal moult. 



Above, including sides of head rich oHve-brown. AYings and tail rather darker, 

 edged with deep olive-green, the wing coverts with wood-brown. Below, pale 

 raw umber-brown, Naples-yellow on the abdomen and crissum. Bill and feet 

 flesh-color, the former becoming dusky. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult in Jul}- which involves the body plumage and the wing 

 coverts, but not the rest of the wings nor the tail. 



Similar to previous plumage. Above, olive-green including the wing coverts. 

 Below, including superciliary stripe, bright canary-yellow. The forehead, 

 crown, lores and auriculars are partly black much veiled by smoke-gray edg- 

 ings. 



4. First Nuptial Plumage acquired by a partial prenuptial 

 moult which involves a part of the head, chin and throat, but 

 no other areas. The black crown with plumbeous edgings, the 

 black lores, auriculars and a short extension on the sides of the 

 neck are assumed, together with the yellow feathers of the chin 



