Dec, 1908] Torre Bueno : Hemiptera Heteroptera. 237 



Family OCHTERID^. 

 Genus Ochterus Latr. 



(= Pe logo nu s olim.) 



96. 0. americanus Uhl. 



White Plains, July 16 and September 1. 



Family NAUCORIM:. 

 Subfamily Naucoriisle. 



Genus Pelocoris Sta 



97. P. femoratus Pal. Beauv. 



White Plains, Aug. 24. Nymphs only. I have seen no adults and 

 it does not appear to be common hereabouts. 



Family BELOSTOMA TIM). 



Genus Benacus Stal. 



98. B. griseus Say. 



White Plains, May 18, at electric light. 



Genus Lethocerus Mayr. 



(= Amorgius Stal = Belostoma auct. nee Latr.) 



99. L. americanus Leidy- 



White Plains, May 14, at electric light; June 1, taken dredging 

 in a ditch ; July 23, also taken by dredging, a just transformed adult. 



100. L. obscurus Duf. 



White Plains, April 29, May 14 and 18, September; all at elec- 

 tric light. This appears to be the common species here. 



Genus Belostoma Latr. 



( = Zaitha auct.') 



101. B. flumineum Say. 



White Plains, common in ponds at all times. 



Family NOTONECTID^. 

 Subfamily Notonectinve. 



Genus Notonecta Linne. 



102. N. insulata Kirby. 



White Plains. Quite abundant in spring and late summer in 

 deep, cool pools. 



