BIRDS OF NOETH AND MIDDLE AMERICA. 



129 



middle rectrices fading into white on lateral rectrices, all the rectrices 

 except outer pak with a sub terminal dusky area; bill black terminally, 

 orange or orange-yellow basally; iris dark brown; legs and feet 

 orange-yellow (in Ufe). 



Adult female in summer. — Similar to the male and not always dis- 

 tinguishable, but usually ( ?) with the black crown-band and jugular 

 areas more restricted and duller black. 



Viinter plumage. — Similar to the summer plumage but without 

 black on fore part of crown and lateral jugular patches light brownish 

 gray instead of black. 



Young. — Similar to the winter plumage but feathers of upper 

 parts margined with pale buff or whitish. 



Downy young. — Forehead, superciliary, loral, suborbital and malar 

 regions, nuchal collar and under parts immaculate white; crown and 

 occiput pale grayish buffy with a few small and narrow, mostly longi- 

 tudinal, markings of dusky brown; back, rump, etc., pale grayish 

 buffy, sparsely marked with irregular zig-zag lines of dusky brown, 

 the sides of rump with an ill-defined longitudinal patch of dark 

 brown; anterior portion of wing pale grayish buff with a rather large 

 blotch of dusky brown, the posterior portion, and whole of hand- 

 wing, immaculate white. 



Adult male.— Wing, 113-124 (116.7); tail, 47.5-55 (50.6); cuhnen, 

 11.5-13.5 (12.6); tarsus, 20.5-23.5 (21.8); middle toe, 14-15.5 (14.8).« 



Adult female.— Wing, 112-121 (114.2); tail, 47-51 (48.7); culmen, 

 11-13 (11.9); tarsus, 20.5-22.5 (21.2); middle toe, 14-16 (14.4).^ 



40017— 19— Bull. 50, pt S 10 



