The Genus Eotrechus (Heteroptera: Gerridae) In Vietnam With Descriptions Of Two New Species Author Polhemus, John T. Author Tran, A. D. Author Polhemus, Dan A. text Raffles Bulletin of Zoology 2009 2009-02-28 57 1 29 37 journal article 10.5281/zenodo.5341554 2345-7600 5341554 KEY TO SPECIES OF EOTRECHUS OF VIETNAM 1. Male pygophore with posterolateral projections bearing a finger-like process at apex. Female genitalia totally concealed by sternum VII and tergum VIII ......... E. brevipes Andersen – Male pygophore with posterolateral projections (if present) without finger-like process at apex. Female genitalia not concealed by sternum VII and tergum VII...........................2 2. Pronotum and mesonotum with a prominent light median longitudinal stripe, laterally with brownish markings, but not extensive light markings. Male genitalia without prominent posterolateral projections ( Figs. 8, 10 ) .................................... ........................................................ E. fansipan , new species – Pronotum and mesonotum with extensive light markings medially and laterally. Male genitalia with prominent posterolateral projections ( Figs. 14, 16 ) .............................. 3 3. Male pygophore with a pair of prominent posterolateral digitate and flat projections ................. E. vietnamensis Tran & Yang – Male pygophore with a pair of prominent posterolateral broad foliate processes, directed upward in lateral view ( Figs. 14–16 ) ................................................. E. pumat , new species