74 

 exist at Chestnut Hill and Lansdowne in 1902 (Cassinla 190$. 

 In the Alleghanian fauna, it becomes more common, while tbru- 

 out the northern tier of counties and practically everywheee 

 in the Canadian fauna, the Cliff Swallow is one of the most 

 abundant birds, and I have breeding records from nearly 

 every county in those regions. 



613. Hirundo erythrogaster (Bodd.). Barn Swallow. 



Everywhere thruout the open country in the state 

 and even on the borders of our larger cities this beautiful 

 swallow breeds abundantly. Paunal distinctions seem to have 

 no bearing upon the distribution for from the lowlands of 

 the Delaware River to the tops of the Alleghanias the Barn 

 Swallow may be seen flitting gracefully about the open 

 fields and meadows. 



614. Iridoprocne bicolor ( Vieill . ) . Tree Swallow. 



Dr. Warren in writing of this bird in his "Birds 

 of Pennsylvania" speaks of this bird as breeding regularly 

 thruout the X3CCXX state. More recent Investigations seem to 

 limit it almost entirely to a few of the counties in the 

 Canadian fauna, tho it undoubtedly nests sparingly in the 

 Alleghanian. Mr. Stone has found tt to be a rather common 



