Head without anteriorly-projecting genal processes. Gular sutures widely separated or absent. Cervical sclerites present. Number of antennomeres 11. Antennae when posteriorly extended not reaching middle of prothorax.
Antennae capitate .
Antennae at least partly pubescent or with obvious modifications. Antennal modifications beginning on antennomere 5 or beyond. Major portion of labrum strongly transverse. Apex of labrum slightly concave or emarginate. Labrum moderately to heavily sclerotized, except at base and-or apex.