44 Journal New York Entomological Society. rvoi.xm. 



Genus BELOSTOMA Latreille {=Zaitha auct.). 

 B. flumineum Say. 



Bronx, N. Y. City, September 9 ; Forest Pk., L. I., X. V., November 7 ; Pali- 

 sades, N. J., August 20 and 22, September 7 ; Staten Id., N. Y., August 16, Sep- 

 tember 8 and 26, October 24 and 25 ; Van Cortlandt Pk., N. Y. City, March 25 ; 

 Rah way R., Cranford, N. J., August 6 and 20. 



This is by far the most abundant member of the family, or at least, the most 

 easily taken. It can be found in almost any muddy pond with abundant vegetation. 



B. testaceum Leidy. 



Delair, N. J. This is additional to the N. J. List, and was sent to me by Mr. 

 W . P. Seal among a lot of aquatics he very kindly favored me with. 



B. sp. 



Delair, N. J. Van Cortlandt Pk., N. Y. City, March 28. This form I have 

 found now and then, and have taken about three or four specimens all told. It is 

 smaller and rounder than either of the two preceding, and I cannot satisfactorily 

 identify it. 



Genus AMORGIUS Stal (=- Belostoma auct.). 

 A. americanum Leidy. 



Ft. Lee, N. J., April and September 18. 



A. obscurum Dufour. 



Ft. Lee, N. J., April and September 18. Mt. Vernon, N. Y., June 4. 



This name has been reduced to synonymy, and so appears in Prof. Uhler's 

 "Check List." Prof. Montandon, however, rehabilitates it and shows that it repre- 

 sents undeniably a good species.* This and the preceding I have taken in the last 

 nymphal stage and allowed to come to maturity in my aquaria. This is the only way 

 I have been able to get them, and except at electric lights, I doubt that it is easy to 

 capture swift swimmers. The nymphs of both species differ from the adults, in addi- 

 tion to the lack of wings and general undeveloped condition, in having the anterior 

 tarsi biungulate. 



Genus BENACUS Stal. 



B. griseus Say. 



New York City, July 22. 



This is the only specimen I have taken of this insect. 1 found it flapping its 

 wings under an electric light. Mr. Davis, however, has a good series from Staten 

 Id. It appears to be much more abundant than Amorgius, 



Family NEPID.L. 



Genus NEPA Fabricius. 

 N. apiculata Uhler. 



Staten Id., N. V. (Davis). Mt. Vernon, N. Y; Westfield, N. J., July 16 

 and August 1 3. 



*" Hem. Het. Exotiques, Notes et Descr., II, Fam. Belostomidre," Ann. Soc. 

 Ent. Belg. t., XL, pp. 508-520, 1896. 



