Corticotomus Sharp 1891

Body size: about 3.0–5.0 mm. Body shape elongate. Gular sutures narrow, subparallel at apex. Frontoclypeal suture absent. Frons: longitudinal groove or depression absent. Cranium ventrally: tufts of long setae at sides absent. Submentum: ctenidium absent. Antennal groove present. Eyes: size moderate. Eyes number: two. Epicranial acumination deep. Lacinial hooks absent. Galea: shape elongate. Galea: ciliate setae present. Mediostipes-Lacinia not fused. Palpifer: outer edge denticulate. Mandibular apical teeth number: two, horizontally situated. Mola reduced but present. Penicillus (at base) present (fine, often membranous). Pubescence above mola or cutting edge absent. Ventral furrow present. Basal notch shallow or absent. Labrum-Cranium not fused. Epipharyngial sclerite present. Lateral tormal process: projection curved downwards, processes not connected (Airora). Ligula: ciliate setae present. Ligula rigid, not retroflexed, weakly emarginate. Hypopharyngeal sclerite sickle shaped. Antenna 11-segmented. Antennal club asymmetrical, sensorial fields present. Front coxal cavities externally closed, internally open. Pronotum elongate. Prepectus absent. Middle coxal cavities open. Elytra: long hairs absent. Epipleuron moderate. Elytral interlocking mechanism present, carinae reduced. Elytral punctation regular, scales absent. Wing: radial cell open (outer vein present), wedge cell absent, cross vein MP3-4 absent, cross vein AA1+2-3+4 absent. Front tibiae: spines along side large. Hooked spur present. Claws: denticle absent. Spiculum gastrale absent. Tegmen composed of two parts. Coxitae undivided.

Distributed from Brazil to Canada. One species, unknown to me, is described from Chile.