Mesoveliidae? on duckweed at Yigo Ag Expt Stn Came across small bugs running on the surface of duckweed. Possible Mesovelia vittigera. See [1]. ReferencesE. A. Englund, “Guam and Palau Aquatic Insect Surveys”, Bishop Museum, Honolulu, 2011. Classification: Mesoveliidae (Taxonomy), Mesovelia (Taxonomy), Mesovelia vittigera (Taxonomy) Aubrey Moore's blog