CATALOGUE OF INSECTS. 109 



P. diffusus, Say. 



New Jersey Collection United States National Museum. 

 P. perplexue, Lee. 



Brigantine Beach, in September, in fresh-water pools Hamil- 

 ton. New Jersey Collection Roberts and United States Nat- 

 ional Museum. 



P. hamiltoni, Horn. 



Brigantine Beach, in September Hamilton. 



HYDROCOMBUS, Sharp. 

 H. flmbriatus, Melsh. 



Camden and Gloucester counties, common Wenzel. New 

 Jersey Collection Roberts and United States National Museum. 



H. lacustris, Lee. 



Sea-shore, common Liebeck. Hoboken, common Linell. 

 H. rotundatus, Say. 



Caldwell, rare Crane. 



HYDROBIUS, Leach. 

 H. globosus, Say. 



Westville, rare Liebeck. Caldwell, rare Crane. Newark. 

 New Jersey Collection Roberts and United States National 

 Museum. 



H. fuscipes, Linn. 



Camden and Gloucester counties Wenzel. New Jersey 

 Collection Roberts and United States National Museum. 



H. subcupreus, Say. 



Generally distributed, common Liebeck. Brigantine Beach, 

 in September Hamilton. New Jersey Collection Roberts and 

 United States National Museum. 



H. suturalis, Lee. 



Brigantine Beach, in September Hamilton. 



OERCYON, Leach. 

 O. centromaculatum, Sturm. 



Orange Mountains, rare Smith. 



