- OF EASTERN PENNSYLVANIA. 243 



This species is slightly gregarious. When an 

 individual is shot, the others instead of flying away, 

 still linger about on the lower branches, gazing 

 with a look of wonder and curiosity unmingled 

 with aught of conscious danger. 



Mr. Dall says that it is extremely common near 

 Nilato, wherever there are trees throughout Yukon 

 Territory, and frequents in the winter, groves of 

 poplar and willow near open places, especially 

 waterside, and irr summer seeks sequestered 

 localities for breeding-purposes. 



This species undoubtedly nidificates in borean 

 regions. A nest was found by Mr. Boardman 

 near Calais, about the authenticity of which there 

 can be little doubt, although the parent was unob- 

 served. It was built in an alder-bush 'in a humid 

 situation, at an elevation of nearly four feet from 

 tire ground, and was composed wholly of coarse, 

 green mosses. 



The eggs were two in number, and undistinguish- 

 able from those of the European enucleator. No 

 certainly identified eggs of the American Pine Gros- 

 beak are known in collections. The eggs found 

 by Mr. Wolley, in Iceland, 1858, were oblong- 

 oval, slate-colored with a greenish tinge, and 

 plashed with clouded patches of brown chietiy, and 

 slight spots principally about the larger end of 

 blackish-brown and dark-purplish. They mea- 

 sured i. 02 inches in length, and .70 in breadth. 

 The descriptions of nest and eggs have been 

 substantially taken from the latest work on " North 

 American Birds." 



