230 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY—GENERAL REPORT. 
One specimen, 4469, differs in a decided tendency to white about the throat and neclc ; 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. 
Eyes light brown. 
