Published online by Cambridge University Press: 10 July 2009
Head antero-posteriorly short; occipital edge sharp; from in front broader than long; eyes moderate, bare; inner orbits a little convergent ventrally; genal space long; face wide; toruli high up, distinctly above the base line of eyes and only slightly below the mid point between the anterior ocellus and mouth-edge. Labrum conspicuous, simple, transverse; mandibles similar, pear-shaped, produced apically into a fine short incurved spine-like tooth. Maxillary palpi three-jointed; labial palpi two-jointed. Inner aspect of galea and opposed side of ligula densely and finely pilose (N.B.—The first maxillary joint has an extremely narrow ill-defined annular base which may represent an obsolete joint). Antennae ten-jointed; scape, pedicel, ring joint, 6 in funicle, and solid club. Scape simple, cylindrical, reaching to about level of anterior ocellus; pedicel short; 1st funicular longer than either the 2nd or the pedicel; funicle (distally) and club somewhat flatly expanded; sensoria numerous, very narrow, short and low, not produced distally. Thorax: mesoscutum separated from scutellum by the broadly meeting axillae, distinctly shorter (measured from its posterior edge to that of pronotum) than scutellum; the latter ending over the metanotum in a short truncate plate; mesopleura posteriorly truncate. Propodeon, smooth between the spiracles; on the middle third are three linear longitudinal thickenings of the integument, the latter pair lying in shallow furrows. Round the spiracles and on the pleura the surface is densely covered with short bristles. Wings: forewings with apical fringe and completely pilose, except on the linea calva. Neuration to about one half. Radius emitted before the costa, long, gently curving towards and subequal to the postmarginal; two bands-one across radius, the other apical. Legs: mid and hind legs elongate, subequal and half longer than fore legs. Hind tibiae widened, with two unequal spurs. Tarsal ungues of all legs markedly unequal, the posterior shorter and more abruptly curved apically than the anterior. Abdomen broad; 1st visible tergite (iii) about half longer than 2nd (iv), 3rd–7th gradually decreasing in length. The last three sternites densely set with short bristles. Ovipositor weakly chitinised.