OF EASTERN PENNSYLVANIA. 169 



among the exuberant shrubbery upon the 

 margins of the canyons of the lofty interior moun- 

 tain ranges. Mr. Nuttall speaks of its breeding 

 in Oregon, and Mr. Audubon in Labrador. We 

 have no evidence that it breeds in our Middle and 

 Northeastern States, but future explorations may 

 show that in limited numbers it does so in North- 

 western Maine. 



A nest discovered in Oregon by Mr. Nuttall, on 

 the 1 6th of May, was placed very adroitly upon a 

 mass of Usnea, on a branch of the service-bush. It 

 was composed external!^ of Hypnum mosses, and 

 internally of dry, wiry grasses. Another found in 

 Labrador by Mr. Audubon, was placed in the very 

 centre of a thicket, at the extremity of a horizontal 

 branch, almost concealed by the foliage of a stunted 

 fir. It was composed of pine-twigs and dry mosses 

 agglutinated to the leaves and branch upon which 

 it was hung, and was "lined with fine vegetable 

 fibres. The diameter was three and a half, and 

 the depth one and a half inches. 



The eggs are usually four in number, obovate 

 in shape, and spotted with reddish and brown dots 

 upon a white background: Audubon describes 

 these markings as forming a circle about the 

 larger end, leaving the extremity plain. 



Myiodioctes Canadensis, Aud. 



The Canadian Flycatcher is quite abundant in 

 Eastern Pennsylvania in transilu, arriving from its 

 genial southern home early in May, and remains 



