39 

 Waynesburg, Green County, and during the season of 1910 

 collected four sets of eggs. 



387. Coccyzus americanus americanus (Linn.). Yellow-billed 

 Cuckoo . 



The Yellow-billed Cuckoo, or Rain Crow, is the 

 common cuckoo of the Carolinian and Alleghanian life zones, 

 becoming rare in the northern and mountainous counties. In 

 southeastern Pennsylvania, it is very common, while Mr. 

 Dickey finds it regularly in the southwestern portions of 1 

 the state. As we approach the foothills of the Alleghanies, 

 it is gradually replaced by the Black-billed Species, and 

 Mr. Simpson writes me that it is very rare at Warren, while 

 I have found it only on very rare occasions in Pike, Monroe, 

 and Wayne Counties. In Center County, it is a regular 

 breeder in the open valleys and gradually appears to be 

 pushing its way northward. 



388. Coccyzus erythrophthalmus ( Wils .K Black-billed Cuckoo. 



In the southern counties, the Black-billed Cuckoo 

 is a rare breeder, tho probably regular. In the Alleghanian 

 and middle counties, both species occur often, while in the 

 mountain and northern sections the Black-billed is a common 

 bird and practically replaces the Yellow-billed variety. 



