80 



636. Minotilta viria ( Linn . ) . Black and White Warbler. 



The Black and White Warbler breeds in practically 

 every county of the state but is rather irregularly distrib- 

 uted and in many sections is decidedly rare. In southeastern 

 Pennsylvania, it is one of the rare breeding birds, tho 

 several nests have been found in Chester, Delaware, and 

 Montgomery Counties. To the northward, it becomes a more 

 common breeding bird, and in the mixed growth of the Pocono 

 Plateau it is one of the characteristic birds. In the 

 southwestern counties, this species is a regular breeder, a 

 number nests having been taken near Waynesburg by Messrs. 

 Jacobs and Dickey. About Warren in Warren County, Mr. Simp- 

 son finds it to be a rare breeder, while in sections of 

 McKean and Potter Counties, it is X rather common as it is 

 over a large part of Center County. 



639. Helmitheros vermivorus (Gmel.). Worm-eating Warbler. 

 In certain sections of the Carolinian fauna in 

 Pennsylvania, this Warbler is more abundant, perhaps, than 

 anywhere else within its range. In sections of Chester 

 County, especially in the Brandywine hills, it has been 

 frequently found by Messrs. Ladd and Jackson. In Philadel- 

 phia County, it is scarce but breeds regularly on the Wissa- 

 hickon Creek, while in sections of Montgomery and Delaware 

 Counties it is a regular breeder. In the lower Susquehanna 



