BIRDS OF PENNSYLVANIA. 



155 



The eggs, usually four in number, are very similar in size, etc., to those 

 of the Wood Pewee they are creamy-white, spotted with reddish- 

 brown. During the late summer and autumn months this species 

 subsists to a limited extent on various kinds of berries. 



466a. Empidonax pusillus traillii (AuD.). 



Traills' Flycatcher. 



DESCRIPTION. 



Upper parts dark olive-green, lighter under the wings, and duller and more tinged 

 with ash on nape and sides of the neck ; center of the crown feathers brown ; a pale 

 yellowish-white ring (in some specimens altogether white) round the eye ; loral 

 feathers mixed with white ; chin and throat white ; the breast and sides of throat 

 light-ash tinged with olive, its intensity varying in individuals, the former some- 

 times faintly tinged with olive ; sides of the breast much like the back ; middle of 

 the belly nearly white ; sides of the belly, abdomen, and the lower tail coverts sul- 

 phur-yellow ; the quills and tail-feathers dark-brown, as dark (if not more so) as 

 these parts in C. virens ; two olivaceous yellow-white bands on the wing, formed by 

 the tips of the first and second coverts, succeeded by a brown one, the edge of the 

 first primary and of secondaries and tertials a little lighter shade of the same ; the 

 outer edge of the tail feathers like the back, that of the lateral one rather lighter ; 

 bill above dark-brown, dull-brownish beneath ; iris brown. 

 'Length nearly G inches ; extent about 8.75 inches. 



Hab. Eastern North America, breeding from the Middle States (southern Illinois 

 and Missouri) northward ; in winter south to Central America. 



Traills' Flycatcher, a somewhat suspicious frequenter of thickets, 

 near streams or ponds. I have found in Pennsylvania only as a rare 

 spring and autumnal migrant. In the spring it arrives generally early 

 in May; when returning to its winter resorts beyond the southern 

 limits of the United States, it is again seen, but only for a few days, 

 about the twentieth of September. In addition to insects, this spe- 

 cies, it is stated, feeds also on different kinds of berries. 



467. Empidonax minimus BAIRD. 



Least Flycatcher. 



DESCRIPTION. 



Above olive-brown darker on the head, becoming paler on the rump and upper 

 tail covets ; the middle of the back most strongly olivaceous ; the nape (in some in- 

 dividuals) and sides of the head tinged with ash ; a ring round the eye, and some of 

 the loral feathers white, the chin and throat white ; the sides of the throat and across 



