The genus can be recognized by having the tubercle on the base of the abdomen in apposition to a notch in the posterior face of the metasternum; the metasternum is flat or sulcate; the mesosternum has a low, obtuse, mesial carina; the first labial segment is between the bucculae; the mandibular plates and clypeus are equal in length; the antennal segment I not reaching the apex of the head; the femora is unarmed; the tarsi is three segmented; and the frenal margin of the scutellum is longer than the apical portion (Thomas & Yonke 1990).