CATALOGUE OF INSECTS. 109 



P. dififtisus, Say. 



New Jersey — Collection United States National Museum. 

 P. perplexus, 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. fimbriatus, Melsh. 



Camden and Gloucester counties, common — Wenzel. New 

 Jersey — Collection Roberts and United States National Museum. 



H. lacustris, Lee. 



Sea-shore, common — Ijiebeck. 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. 



CERCYON, Leach. 

 C, centromaculatum, Sturm. 



Oraifige Mountains, rare — Smith. 



