216 



REVIEW OF AMERICAN BIRD§, 



f PART I. 



sulphur yellow tinge beneatli, and ochiy superciliary stripe, as well 

 as in other characters, with autumnal Carlisle specimens, while others 

 are much paler. Generally in spring the belly is paler in color, and 

 the streaks better defined, the eye stripe purer; in autumn more 

 sulphuraceous ; while later in the winter the colors appear to become 

 paler and more like the spring plumage. 



Skins from Guatemala, and one labelled as from Brazil, have the 

 concealed median yellowish patch at the base of the forehead rather 

 more distinct than in Xorth American ones ; the under parts, espe- 

 cially the crissum, with the superciliary stripe, paler, nearly white, 

 and the streaks apparently encroaching less on the belly. These 

 characters, however, are matched separately in North. American 

 skins, and may be merely a peculiarity of winter dress. 



A very young bird (22,619), from the north, has the feathers of 

 upper parts, including wing coverts, distinctly tipped with brownish- 

 yellow ; the sub-terminal portion very dark. In a still older speci- 

 men, the only difference from the adult is in the presence of dusky 

 spots on the back, with scattered specks of yellowish. 



No North American bird exceeds the present in the extent of its 

 range : from the Arctic Ocean in the north, to New Grenada and 

 Brazil to the south. 



Specimens from many localities throughout the whole United 

 States from the Atlantic coast to the Missouri River, and north 

 almost to the shores of the Arctic Ocean. Those from points west 

 of this, and from regions beyond the limits of the United States, 

 are as follow : — 



