Diagnosis. Vertex vaulted and extending above level of compound eyes; funicle 2-segmented; pronotum elongate; notaulus curved and extending to anterior half of axilla;
axilla strongly advanced, typically elongate, mostly anterior to scutellum; mesoscutum
elongate, longer than scutellum; scutellum with 2 pairs setae, and 2 parallel submedian
grooves which are often difficult to discern due to color pattern; forewing often with
fuscate areas; propodeum without plicae, but with remnants of a median carina; color
at least partly yellow, often with striking patterns, not metallic.