454 GEOLOGICAL SURVEY OF NEW JERSEY. 



PERLA, Geoff. 

 P. abnormis, Newn. 



P. arida, Hagen. 



P. coulonii, Pictet. 



P. tristis, Hagen. 



P. capitata, Pictet. 



P. similis, Hagen. 



P. xanthenes, Newn. 



P. occipitalis, Pictet. 



P. placida, Hagen. 



P. ephyre, Newn. 



ISOPTBRYX, Pictet. 

 I. cydippe, Newn. 



CAPNIA, Pictet. 

 C. pygmsea, Burm. 



T^NIOPTBRYX, Pictet. 

 T. fasciata, Burm. 



Caldwell, common— Crane. 

 T. similis, Hagen. 



Caldwell, not common — Crane. 

 T. maura, Pictet. 



NEMOURA, Pictet. 

 N. albidipennis, Walk. 



LEUOTRA, Stephens. 

 L. tenuis, Pictet. 



Family £PH£M£RIDiE. 



PALINGBNIA, Burm. 



P. bilineata, Say. 



Caldwell, common — Crane. 

 P. limbata, Serv. 



