First Inventory Of The Water Bugs (Heteroptera: Nepomorpha: Gerromorpha) Of Langkawi Island, Kedah, Malaysia Author Zettel, Herbert Author Tran, A. D. text Raffles Bulletin of Zoology 2009 2009-08-31 57 2 279 295 journal article 10.5281/zenodo.5342032 2345-7600 5342032 Hydrometra jaczewskii Lundblad, 1933 Material examined. – (all brachypterous): Air Tejun: 1 male , 1 female , HZL10 . 1 male , 1 female , TAD0623 . Distribution. – Southern China , West Malaysia , Sumatra, Java, and Borneo ( Yang & Zettel, 2005 ).