Hydrophylax. New genus. Antennas S-jointed; scape, pedicel, ring joint, 2 funicle joints and 3-jointed club. Fore wings extremely narrow, twenty times as long as wide; marginal cilia at least four times as long as the width of wing. Abdomen is conic-ovate, broadly joined to the body. Ovipositor slightly exserted.
Type species: Hydrophylax aquivolans