1896.] NATUKAL SCIENCES OF PHILADELPHIA. 163 



have more or less black on the head and perhaps sometimes attain 

 the full plumage of the male, as in the last species. 

 Sylvania canadensis (Linn.). Canadian Warbler. 



Plumages and molts as in the last. The adult in autumn is 

 exactly like the spring bird. 



Setophaga ruticilla (Linn.). American Redstart. 



Plumages, first, first winter, first nuptial, adult winter, adult nup- 

 tial. 



Spring molt is mainly restricted to the under surface in the first sea- 

 son at least and probably afterward. Young in their first nuptialdress 

 differ from that of the first winter only in the acquisition of a few 

 scattered black feathers ; new tertials are sometimes acquired in 

 spring also. Some winter adults have gray edgings to the black 

 feathers, others are indistinguishable from spring birds. 



Family MOTACILLID^. 

 Anthus pensilvanicus (Lath.). Tit Lark. 



PlumageSj first, winter, nuptial. 



There is considerable molt of the body plumage in spring. Spec- 

 imens taken in January and February are much abraded and 

 resemble June birds. 



Family TROG-LODYTIDiE. 

 Mimus polyglottos (Linn.). Mocking-bird. 



Plumages, first, winter and nuptial. 



There appears to be no spring molt, at least no specimens show 

 traces of it. April birds show much abrasion, especially on the 

 plumage of the back, and the buff" tints of winter disappear entirely 

 from the lower surface. 

 Galeoscoptes carolinensis (Linn.). Catbird. 



Plumages and molt apparently as in the last. Some spring birds 

 have the plumage quite fresh, but abrasion produces very little effect 

 in this species, as shown by a comparison of spring and midsummer 

 examples, so that I do not consider this as indicating a spring molt. 

 Furthermore, none of the winter specimens examined show any 

 indications of molt. 

 Harporliynclius rufus (Linn.). Brown Thrasher. 



Plumages and molt as in Mimus. Spring birds are somewhat 

 abraded, especially on the head, while the spots on the breast appear 

 " clipped " at the tip and somewhat bifurcate. Some fall birds are 



