Hydrochus obscurus Sharp, 1882: 90 H. corruscans Bruch ( Argentina ) H. elsjeae Makhan ( Bolivia ) Taxonomy of Peruvian water beetles in the genus Hydrochus Leach, 1817 (Coleoptera: Hydrochidae) Perkins, Philip D. Zootaxa 2020 2020-10-23 4868 1 61 89 6MK96 Sharp Sharp 1882 [151,486,756,783] Insecta Hydrochidae Hydrochus Animalia Coleoptera 27 88 Arthropoda species obscurus   Fig. 2      Hydrochus obscurus Sharp, 1882: 90 Originally described from Guatemala. Records from several South American countries are in the literature; however, some of these records are invalid synonymies proposed by Oliva (1992), for  H. corruscansBruch ( Argentina)(see Perkins 2019a), and  H. elsjeaeMakhan ( Bolivia)(Perkins, in prep.). Locality data and deposition records have been published for Venezuela( Perkins 2019c). The one locality data record from Peruis given below. Habitus and male genitalia illustrations are given in Perkins (2019c, 2020a).   Material examined (3):  PERU: Madre de Dios, Rio Tambopata Res; 30 air km SW Pto. Maldonado, elev.  290 m( 13°0’S, 69°33’W),  16–20.xi.1979, leg. J. B. Heppner(3 NMNH). 3015416334 1979-11-16 1979-11-20 1979-11-16 NMNH SW Pto. Maldonado & J. B. Heppner Peru 290 -13.0 Rio Tambopata Res 1291 -69.55 27 88 1 Madre de Dios