162 PROCEEDINGS OF THE ACADEMY OF [1896. 



out a series of winter specimens it is impossible to ascertain the 

 extent of spring molt in any Seiurus. 



Geothlypis trichas (Linn.). Maryland Yellow-throat. 



Plumages, first, first winter, nuptial, adult winter. 



The spring molt seems confined to the breast, throat and sides of 

 the head. Adults in winter have the hood much obscured by lighter 

 edgings, while young have it reduced to a patch on the ear coverts 

 and sides of neck. 



Female. — Sometimes has no spring molt whatever. 

 Geothlypis Philadelphia (Wils.). Mourning Warbler. 



Plumages and molts apparently as in the preceding species. 

 Geothlypis agilis (Wils.). Connecticut Warbler. 



Plumages and molts as in G. trichas. The spring molt is mainly 

 restricted to the throat. Adults in spring and autumn are practic- 

 ally indistinguishable below, but the former show abrasion above. 

 Young in the first winter have the throat and breast brownish in- 

 stead of gray. 



Geothlypis formosa (Wils.). Kentucky Warbler. 



Plumages and molts as in G. trichas. I have no specimens of the 

 young in their first winter and cannot say whether the black mask 

 is complete then or not. 



Icteria virens (Linn.). Yellow-breasted Chat. 



Plumages, first, winter, nuptial. 



There is scarcely any difference in spring and autumn specimens, 

 except that the former show abrasion above. The spring molt ia 

 probably restricted to the under surface. 



Sylvania mitrata (Gmel.). Hooded Warbler. 



Plumages, first, winter, nuptial. 



jNIr. Wm. Palmer,^^ has shown that the male of this species acquires 

 the full black hood the first year, and that the female varies in suc- 

 ceeding molts in the amount of black, finally attaining the full hood 

 also. 



Sylvania pusilla (Wils.). Wilson's Warbler. 



Plumages, first, first winter, nuptial, adult winter. 

 Spring and fall adults are practically alike, and there is evidently 

 a spring molt. Young of the year lack the black cap. Females 



23 



Auk, 1894, p, 237. 



