1 68 REPORT OF NEW JERSEY STATE MUSEUM. 



BENACUS Stal. 



B. griseus Say. Throughout the State in ponds and at electric lights; the 

 largest of our species. 



LETHOCERUS Mayr. (BELOSTOMA.) 



L. americanus Leidy. Throughout the State 

 at light, VII, VIII, in ponds all season; 

 sometimes common and hardly smaller 

 than the preceding. 



L. obscurus Duf. With the preceding and 

 usually confused with it, but less com- 

 mon. 



L. uhleri Mont. Ft. Lee Dist. (Bt). 



BELOSTOMA Latr. (ZAITHA A & S.) 



B. fluminea Say. Throughout the State V- 

 X. It is the commonest of the medium 

 sized water bugs of this family. 



B. testaceum Leidy. Delair (Coll). 



Fig. 70. Giant water bug, 



B. aurantiacum Leidy. Riverton IX, 5 (Jn). Lcthocems americanus. 



Family CORIXID^E. 



These are the water-boatmen which inhabit almost every clean pond, 

 permanent pool or sluggish stream. They are somewhat flattened above, 

 have a broad short head and an exceedingly hot tongue. The species 

 are predatory in habit, closely allied and not well determined in collec- 

 tions. Practically all that can be done under the circumstances is to 

 give a list of those species that are so distributed that their occurrence 

 in New Jersey is a reasonable certainty, adding the localities for such 

 as have been determined with reasonable certainty. 



ARCTOCORISA Wallen. (CORISA.) 



A. calva Say. Caldwell (Cr) ; Jamesburg VI, 16 (Coll). 



A. tarsalis Fieb. "Atlantic States" (Uhl). 



A. signata Fieb. "Atlantic States" (Uhl). 



A. lateralis Leach, (hieroglyphica Duf.) "Atlantic States" (Uhl). 



A. vertical is Fieb. "Atlantic States" (Uhl). 



A. burmeisteri Fieb. "Atlantic States" (Uhl). 



A. interrupta Say. "United States" (Uhl). 



A. erichsonii Leach. "Atlantic States" (Uhl). 



