NICO NIESER & PINGPING CHEN Tiel, The Netherlands SIXTEEN NEW SPECIES OF NEPOMORPHA (HETEROPTERA) MAINLY FROM SULAWESI (INDONESIA) Notes on Malesian aquatic and semiaquatic bugs (Heteroptera), VIII Nieser, N. & P. P. Chen, 1999. Sixteen new species of Nepomorpha (Heteroptera) mainly from Sulawesi (Indonesia). – Tijdschrift voor Entomologie 142: 77-123, figs.1-135, tabels 1, 2. [ISSN 0040-7496]. Published 22 September 1999. Representatives from the Nepomorphan families Belostomatidae, Corixidae, Helotrephidae, Micronectidae, Notonectidae, Ochteridae and Pleidae, mainly from Sulawesi, are discussed and, where appropriate, keys are provided. In addition, a table of species from Sulawesi and ad- jacent areas is provided and some comments on the biogeography of the infraorder in the area are given. The following new species are described: Micronectidae: Micronecta kymatista and Micronecta pachynychi from Sulawesi, Micronecta aleksanderi from Jawa, Micronecta skutalis from Sabah; Helotrephidae: Helotrephes otoeis from Sabah; Hydrotrephes makros and Hy- drotrephes mexon from Sulawesi, Hydrotrephes zetteli from Sangir Is., Hydrotrephes polhemi from Flores, Hydrotrephes pardalos and Hydrotrephes stereos from Mindanao; Notonectidae: Anisops rhomboides from Sulawesi, Mindanao and Brunei, Anisops salibabu from Sulawesi and Talaud Is.; Ochteridae: Ochterus homorfos and Ochterus trichota from Sulawesi, Ochterus pardalos from Mindanao. Correspondence: Dr. N. Nieser, Htg. Eduardstr. 16, 4001 RG, Tiel, NL. E-mail: if-
[email protected] Key words. – Nepomorpha, Anisops, Helotrephes, Hydrotrephes, Micronecta, Ochterus new species, keys; Indonesia, Sulawesi, Sangir I., Flores, Philippines, Mindanao, Malaysia, Sabah. For the time being, this paper completes our treat- divided by the difference between width of head (D) ment of Sulawesi Nepomorpha. The set of papers and synthlipsis, in formula: 2S/(D-S).