or orange-brown; ocelli and eyes red-brown, eyes shaded with black; tips of mandibles black; antennae uniformly brown, not normally appreciably darkening apically, mesonotum brown, in some specimens faintly infuscated with darker brown; metanotum dark brown; abdomen red-brown, usually not appreciably darker towards apex; mesosternum brown; legs red-brown clothed with golden pubescence; claws dark brown; wings hyaline, veins and costa dark brown, stigma light to reddish-brown.

Frons finely but distinctly striolated, bordered by lateral carinae; face slightly wider than long and convex in centre; clothed with fine pubescence; face more closely punctured than clypeus; flagellum is usually 57 segmented; notauli grooves well marked; scutellum prominent, much narrowed towards apex, with strong lateral carinae and with the surface minutely punctured; propodeum finely transversely striolated, carinae posteriorly strong, terminating anteriorly in a prominent spine-like process; pleurae sclerites distinct; spines on tibiae as in N. ephippiatus; claws strongly pectinate; areolet of anterior wing triangular, usually more widely open along outer side (Fig. 8).

Male similar to female.

This species, at least in the case of the females, is slightly larger than N. ephippiatus, and differs from that species by the absence of black on the vertex, mesonotum and mesosternum, accompanied by a darkening of the apical portions of the abdomen. In the majority of specimens examined the propodeum may be slightly more convex and their lateral keels more distinct, and more deeply impressed at base, this depression being almost bifurcate, through the centre being raised. The lower part of the mesopleura is not depressed as it is in N. ephippiatus, also the stigma of the fore-wings is usually a lighter brown.