1896.] NATURAL SCIENCES OF PHILADELPHIA. 161 



in fall are much whiter beneath than the young and have heavier 

 streaks above. Females remain in a plumage like that of winter. 

 I am uncertain as to the extent of molt in spring. 

 Dendroica blackburniae (Gmel.). Blaekburnian AVarbler. 



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



Some individuals molt the tertials in spring, others do not. Adults 

 differ from young in winter, in the brighter yellow throat and 

 breast. 

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



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



After the first season, the spring molt is much less extensive than 

 in the' species just preceding and in some individuals there seems to 

 be little or no molt. Adults in fall have the black throat as in 

 spring, but all the feathers are edged with white, which is afterwards 

 lost by abrasion. 

 Dendroica vigorsii (And.). Pine Warbler. 



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



After the first year there is little or no spring molt. Winter 

 adults are nearly like summer examples. 

 Dendroica palmarum hypochrysea Pvidgw. Yellow Palm Warbler. 



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



The spring molt is restricted to the breast and crown, and the 

 back shows much abrasion. 



Dendroica discolor (Vieill.). I'rairie Warbler. 



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



The adult birds in autumn are practically like spring specimens 

 but have the black stripes on the breast obscured by yellow edgings. 

 Birds in their first winter plumage lack the chestnut on the back 

 and have but few black streaks below. The tertials are not renewed 

 in spring. 

 Seiurus aurocapillus (Linn.). Orenbird. 



Plumages, first, winter, nuptial. 



Spring birds are practically indistinguishable from autumn exam- 

 ples and there is probably a pretty extensive spring molt. June and 

 July specimens show much abrasion compared with those taken 

 in April. 



Seiurus noveboracensis (Gmel.). Water Thrush. 

 Seiuras motacilla (Vieill.). Louisiana Water Thrush. 



The above remarks apply equally well to these species but with- 



