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DescriptionBody size: 6.8–8.8 mm. Body shape flat. Gular sutures wide, convergent at apex. Frontoclypeal suture broadly emarginate. Frons: longitudinal groove or depression absent. Cranium ventrally: tufts of long setae at sides absent. Submentum: ctenidium absent. Antennal groove present. Eyes: size large, lateral. Eyes number: two. Epicranial acumination absent. Lacinial hooks: two. Galea: shape sub-clavate. Galea: ciliate setae absent. Mediostipes-Lacinia fused together. Palpifer: outer edge even. Mandibular apical teeth number: two, horizontally situated. Mola absent. Penicillus (at base) present (fine, often membranous). Pubescence above mola or cutting edge absent. Ventral furrow absent. Basal notch shallow or absent. Labrum-Cranium not fused. Epipharyngial sclerite absent. Lateral tormal process: projection projection reduced or absent (Promanus). Ligula: ciliate setae absent. Ligula membranous, not retroflexed, deeply emarginate. Hypopharyngeal sclerite H-shaped. Antenna 11-segmented. Antennal club weakly asymmetrical, sensorial fields absent. Front coxal cavities externally open, internally open. Pronotum transverse. Prepectus present. Middle coxal cavities open. Elytra: long hairs absent. Epipleuron moderate. Elytral interlocking mechanism absent, carinae reduced. Elytral punctation regular, scales absent. Wing: radial cell moved down, often small, wedge cell absent, cross vein MP3-4 absent, cross vein AA1+2-3+4 absent. Front tibiae: spines along side moderate. Hooked spur present. Claws: denticle absent. Parasternites number along ventrites III–VII: two. Coxitae divided. Larva: Frontal arms V-shaped. Epicranial stem absent. Endocarina present. Gular sutures conspicuous, convergent. Gula: anterior apodemes absent. Paragular sclerites absent. Hypostomal rods absent. Stemmata number: two. Mandibular apical teeth number: two, horizontally situated. Lacinia mandibulae plumose. Mola absent. Maxillary palpi 3-segmented. Pedunculate seta present. Mala: bidentate protrusion absent. Cardo-Stipes not fused. Cardo: size nearly as large as stipes. Labial palpi 2-segmented. Prementum in single part, anterior margin even. Antennal joints 1 and 2 elongate. Sensory appendix very small. Abdominal segment IX transversely divided. Tergite IX flat. Urogomphi present, hooked; median process present.