Gular sutures widely separated or absent. Corporotentorium incomplete or absent. Cervical sclerites present. Number of antennomeres 9. Antennae when posteriorly extended reaching beyond middle of prothorax but not middle of elytra.
Antennae capitate .
Antennae at least partly pubescent or with obvious modifications. Mouthparts not forming a piercing or sucking tube. Mandible short and broad, or moderately elongate. Incisor edge of mandible simple. Prostheca absent or without articulated, sclerotized process.