occipital margin not bordered with pale pubescence (such pubescence faintly indicated at sides in Opazon_; pronotum without a collar of dense pubescence; radius, if present, not spurious, enclosing, or at least indicating, the limits of a radial cell which is never longer than the marginalis; large term/573" class="passed">sternite simple feebly humped at base only in Opazon_; hind wing with a closed basal cell. eyes with term/763" class="passed">sparse hairs)
occipital margin above with a border of pale pubescence; pronotum with a collar of dense pubescence against its dorsal, posterior margin; a very faint, spurious radius feebly indicates the limits of a radial cell which is much longer than the marginalis; large sternite convex or humped at base; hind wing without a closed basal cell and with at most a very faintly indicated mediella. eyes polished, indistinctly faceted as in Synacra_; no trance of epomia; mesoscutum characteristically bare; dorsal areas of propodeum and term/4001" class="passed">dorsal surface of petiole virtually bare)(Closely related to Acanosema Kieffer, differing from it only in the shape of the mandibles.)