286 DWIGIIT 



6. Adult Nuptial Plumage acquired perhaps by a partial 

 prenuptial moult or perhaps by wear alone. The wear of the 

 black feathers of the crown cannot be safely estimated, and I 

 have seen no birds while in the moult which at best is limited. 



Female. — The plumages and moults correspond to those of 

 the male. The sexes alike in juvenal plumage. In first winter 

 plumage the cap is wholly lacking or sometimes suggested by 

 a few black feathers laterally. The first nuptial plumage is ac- 

 quired by a limited prenuptial moult, the crown becoming 

 partly black, concealed by greenish edgings. The adult winter 

 plumage is much like the male first winter. The adult nuptial 

 plumage differs little from the adult male nuptial. A March 

 bird from Mexico (Am. Mus., No. 68568), in moult, is apparently 

 an adult. 



Sylvania canadensis (Linn.). Canadian Warbler 



1. Natal Down. Sepia-brown. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, Sep a and, when older and faded, hair-brown. Wings and tail dull olive- 

 brown, faintly edged with dull olive-green ; wing coverts paler and indistinctly 

 edged with buff. Below, primrose-yellow washed with pale wood-brown on 

 the throat and sides. Bill and feet pinkish-buff becoming dusky. Practically 

 indistinguishable from S. ptisilla except by duller wing edgings. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult, beginning early in July in eastern Canada, which involves 

 the body plumage and the wing coverts, but not the rest of the 

 wings nor the tail. 



Above, cinereous gray, browner on the back, the crown yellow-tinged and sometimes 

 flecked with black ; wing coverts uniform with the back. Below, including 

 supraloral line lemon-yellow, the orbital ring paler, a narrov/ "necklace" of 

 small black spots on the jugulum the black extending to the auriculars and 

 lores, slightly veiled by overlapping yellow edges ; the crissum dull white. 



The black is very dull and much less extensive than in the 

 adult, some specimens hardly distinguishable from females. 



4. First Nuptial Plumage acquired by a partial prenuptial 

 moult which involves chiefly the head, chin and throat, and not 

 the rest of the plumage. New black, ashy edged crown feathers 



