230 



U, S. p. R. R. EXP. AND SURVEYS ZOOLOGY GENERAL REPORT. 



One specirden, 4469, differs in a decided tendency to white about the throat and neck ; the 

 feet are darker, the claws shorter, stouter, and more curved. The specimen is not in suffi- 

 ciently good order to show whether this whiteness of the throat is characteristic or an indica- 

 tion of a tendency to albinism. It may be proper to remark, however, that most of the Old 

 World species are characterized by the white throat. 



Skins from Fort Massachusetts differ from the others in having the bill entirely black ; the 

 other characters are very similar ; the colors generally are purer, the feathers being less edged 

 with paler. 



List of specimens. 



' Eyes light brown. 



I 



