Found 2 items, similar to Notonecta undulata.
English → English (WordNet) Definition: Notonecta undulata Notonecta undulata n : predaceous aquatic insect that swims on its back and may inflict painful bites [syn: backswimmer]
English → English (gcide) Definition: Notonecta undulata backswimmer \back"swim`mer\ n. any of numerous predaceous aquatic insects of the family Notonectidae (such as Notonecta undulata) that swim on their backs and may inflict painful bites; -- also called boat bug. --[RHUD] [WordNet 1.5 +PJC]