340 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



' 



Adult female in winter: Head, dull white on the crown, and a 

 patch on the side of the back of the head, smoky black or brownish 

 black; under parts, fuscous; breast, grayish; belly, white; tail 

 feathers, pointed, but not elongated as in the male. 



Length (including tail), 21; wing, 8.50; bill, i.io. 



Abundant on Lake Michigan in the late fall and winter and occurs 



