50 

 463, Empidonax flaviventris Baird. Yellow-bellied Flycatcher, 



Despite the fact that no nests have been taken, 

 this shy little Flycatcher undoubtedly breeds rarely, tho 

 not regularly, on the higher parts of the Alleghanies lying 

 within the Canadian life zone. Dr. Warren, in his "Birds 

 of Pennsylvania" , records it as a regular summer resident 

 but does not cite any specific instances, except Mr. August 

 Koch, who records it as common in Lycoming County. Recent 

 starches for the bird in Lycoming County have been fruitless, 

 Mr. Dwight found it on North Mountain in the breeding season 

 about twenty years ago (Auk, 1892), while Mr. Stone records 

 a bird observed in summer in Sullivan County by Mr. Otto 

 Behr, which was evidently this species. Aside from these 

 records, Mr. R. B. Simpson has noted it several times sum- 

 mering in thick, Rhoddodendron swamps near Warren but has 

 never found the nest. Recent search in Pike, Wayne, Monroe, 

 Sullivan, Center, and Hunrtingdon has failed to reveal this 

 species, and it is undoubtedly one of the rarest breeding 

 birds that we have. 



465. Empidonax virescens (Vieill . ) . Acadian Flycatcher. 



This small woodland Flycatcher is very abundant, 

 especially in sections of the statelying in the Carolinian 

 life zone. In the larger part of the Alleghanian; faunal 

 zone, it is uncommon but recently seems to be pushing north- 

 ward with many of our typical Carolinian birds andis now 



