280 DWIGHT 



spicuous orbital ring and a supraloral line are pale canary-yellow, the lores 

 dusky. 



4. First Nuptial Plumage acquired by a partial prenuptial 

 moult which involves chiefly the head and throat. The plumbe- 

 ous cap, the black throat veiled with cinereous, the dusky lores 

 and the white orbital rings are assumed, the rest of the plumage 

 showing a good deal of wear. Old feathers may be found in 

 some cases persisting among the new. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult in August. Similar to first winter dress, but with 

 a distinctly black chin and throat, much veiled with cinereous 

 gray edgings. 



6. Adult Nuptial Plumage acquired by a partial prenuptial 

 moult, as in the young bird. An undated specimen from Pan- 

 ama (Am. Mus., No. 39878), apparently an adult, judging by 

 old feathers, shows new growth on the head and throat. 



Female. — The plumages and moults correspond to those of 

 the male. In first winter plumage the throat is browner and in 

 but slight contrast to the breast, scarcely distinguishable from 

 the male first winter dress of G. agilis. The first nuptial plum- 

 age is acquired chiefly by wear. The adult winter plumage re- 

 sembles the somewhat g-raver first winter male. The later 

 plumages are similar, no black being assumed on the throat. 



Geothlypis trichas (Linn.). Maryland Yellow-throat 



1. Natal Down. Sepia-brown. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, pale olive-brown of variable depth, greenish on the upper tail coverts. 

 Wings olive-brown edged with olive-green, the median and greater coverts 

 faintly tipped with cinnamon. Tail bright olive-green. Below, tawny wood- 

 brown, Naples-yellow on the abdomen and olive-yellow on the crissum. In- 

 conspicuous orbital ring pale buff. Bill and feet pinkish buft" becoming deep 

 sepia with age. 



3. First Winter Plumage acquired by a partial postjuvenal 

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

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

 wings nor the tail. 



