Segment 5 with a more or less evident bevelled or truncate space, false pygidium, which is rather sparsely short, bristly and fuscous, purplish or sericeous in certain lights; ovipositor (applied here to one of a pair of appendages often exserted one on each side of the sting) setiform, fimbriate, apex with several curved divergent spines; mandibles simple; maxillary palpi 3-jointed; scutel finely punctured, sub-bilobed; segments 1–4 with apical fasciæ of pale appressed pubescence