1896.] NATURAL SCIENCES OF PHILADELPHIA. 167 



Fig. 6. Feather from breast of Habia ludoviciana showing the un- 

 worn projecting black tip. Dotted line indicates the 

 original size of feather, the edge having been lost by abrasion 

 (enlarged). 



Fig. 7. Terminal portion of tertial of Habia ludoviciana in winter 

 plumage showing white border spot. 



Fig. 8. Same from spi'ing specimen with white portion lost by 

 abrasion. 



