The following generic diagnosis was provided by Valerio & Whitfield (2005) as a modified description after Austin and Dangerfield (1992), employing additional character state designations from Whitfield et al. (2002).
Head. Antenna with basal flagellomeres exhibiting two ranks of placodes; glossa truncate; maxillary palpus with five segments; head wider than mesosoma; temples round in dorsal view; ocelli small and arranged in a small obtuse triangle on an upwardly elongated vertex; postocciput nitid. Mesosoma. Pronotal lateral area with one ventral groove present; propleuron posterior outer corner simple and without posterior fringe; epicnemial carina present; scutellum with medioposterior band smooth and lunulae of nearly uniform width throughout; metanotum sublateral hairs absent and anterior margin adpressed to scutellum; propodeal dorsoanterior area evenly and gently curved relative to posterior area, mediolongitudinal carina present but only anteriorly, areola complete and typically broadly pentagonal in shape or somewhat poorly developed but similarly shaped, transversal carinae present and very short in length, costulae not completely present (anteriorly absent); hind coxae normal in size; legs tarsal claws simple or pectinated, and fore telotarsus normal in shape. Metasoma. First metasomal tergum with basal excavation present and without medial longitudinal groove, apical half arched and without medial excavation, first tergum narrowing towards apex, at least 1.5x as long as wide and not covering full width of dorsal surface, or parallel-sided; junction of first and second terga movably articulated; second metasomal tergum narrowly triangular in shape; delimitation between second and third tergum by a distinct suture; hypopygium folded medially and without longitudinal pleats; female genitalia with eighth tergum 2–4 times taller than long, second valvifer tall and lorate, ovipositor sheaths elongated with setosity throughout their length and well exposed beyond the apex of hypopygium, ovipositor tapered throughout its length and gently curved in lateral view; male genitalia with apex of digitus acute and directly dorsally, ventral edge of digitus strongly convex. Wings. Vein 3RS straight or weakly curved; fore wing with vein 1M+1Rs weakly angled (20–60°), areolate closed, veins 2A absent, vein r present; hind wing cells 1R and 2R of approximately same width, vein 2r-m present, vein 2A absent, veins 2Cu and cu-a straight, vannal lobe separated from remainder wing by a sharp notch, distally flattened beyond widest point and with vannal setosity long, evenly and dense.
The following generic diagnosis was provided by Valerio & Whitfield (2005) as a modified description after Austin and Dangerfield (1992), employing additional character state designations from Whitfield et al. (2002).
Head. Antenna with basal flagellomeres exhibiting two ranks of placodes; glossa truncate; maxillary palpus with five segments; head wider than mesosoma; temples round in dorsal view; ocelli small and arranged in a small obtuse triangle on an upwardly elongated vertex; postocciput nitid. Mesosoma. Pronotal lateral area with one ventral groove present; propleuron posterior outer corner simple and without posterior fringe; epicnemial carina present; scutellum with medioposterior band smooth and lunulae of nearly uniform width throughout; metanotum sublateral hairs absent and anterior margin adpressed to scutellum; propodeal dorsoanterior area evenly and gently curved relative to posterior area, mediolongitudinal carina present but only anteriorly, areola complete and typically broadly pentagonal in shape or somewhat poorly developed but similarly shaped, transversal carinae present and very short in length, costulae not completely present (anteriorly absent); hind coxae normal in size; legs tarsal claws simple or pectinated, and fore telotarsus normal in shape. Metasoma. First metasomal tergum with basal excavation present and without medial longitudinal groove, apical half arched and without medial excavation, first tergum narrowing towards apex, at least 1.5x as long as wide and not covering full width of dorsal surface, or parallel-sided; junction of first and second terga movably articulated; second metasomal tergum narrowly triangular in shape; delimitation between second and third tergum by a distinct suture; hypopygium folded medially and without longitudinal pleats; female genitalia with eighth tergum 2–4 times taller than long, second valvifer tall and lorate, ovipositor sheaths elongated with setosity throughout their length and well exposed beyond the apex of hypopygium, ovipositor tapered throughout its length and gently curved in lateral view; male genitalia with apex of digitus acute and directly dorsally, ventral edge of digitus strongly convex. Wings. Vein 3RS straight or weakly curved; fore wing with vein 1M+1Rs weakly angled (20–60°), areolate closed, veins 2A absent, vein r present; hind wing cells 1R and 2R of approximately same width, vein 2r-m present, vein 2A absent, veins 2Cu and cu-a straight, vannal lobe separated from remainder wing by a sharp notch, distally flattened beyond widest point and with vannal setosity long, evenly and dense.