elongate triangle; occiput rounded, violet-black, and hairy especially below where they are silvery; front blue-black with delicate brown hairs, narrow especially toward the antennae, above which it suddenly widens to form a triangular area of silvery ash-grey pubescence, along which is a narrow and darker medio-longitudinal stripe.

Antennae about half the width of head or a little more, and situated at the middle line; 1st and 2nd joints bristly, the latter about three-quarters the length of the former, both yellow, but the 1st, owing to the denser bristles, darker than the 2nd; 3rd joint composed of 8 segments, densely pubescent and with 2 terminal hairs, the penultimate segment also having some longer hairs apically; all the 1st and undersides of 2nd and 3rd segments yellow, the remainder fuscous. The dorsal edge of this joint is straight, the ventral approaching the dorsal toward the apex.

Face strongly widening below, hairy, the hairs longer and denser below, shmy blue-black with a greyish pubescence at epistome; facial orbits densely greyish-pubescent; oral margin violet-black and densely hairy, slightly produced downwards posteriorly; proboscis and palpi pale yellow, the latter small and indistinct.

Dorsum of thorax and scutellum brilliant bluish-green, with a vestiture of minute and delicate hairs, each hair arising from a minute depression, giving, on the whole, a delicate punctured appearance. The scutellum is, if anything, bluer than the dorsum, the 4 strong spines being yellow but darker at the base. Humeral and post-alar calli dark tawny, the former with distinct yellow hairs. In certain lights the dorsum may be bronzy-green, violet-blue, or golden. Pleurae with silvery hairs, coloured as the dorsum but the reflections more pronounced.

Anterior and middle femora and tibiae pale yellow; posterior femora thickened, darker than the others and fuscous at the apex; posterior tibiae thickened but not strongly so, darker than the others, slightly fuscous at the knees but strongly fuscous on apical quarter. Anterior tarsi fuscous, the middle pale yellow but darker apically, the posterior thickened, darker than the middle and slightly fuscous toward the apex. All the protarsi longer than the following joint.

Wings yellowish, the veins yellow, the marginal cell clouded with yellow; costal cell strongly widened; auxiliary vein sinuated at apex; 1st sub-marginal cell proximally obtuse; the 3rd vein apparently arising from anterior cross-vein; 1st section of 3rd vein about half the length of the anterior cross-vein, which is perpendicular; 3rd vein slightly sinuated, the anterior branch fully twice as long as anterior cross-vein, arising almost at right angles and bisinuated to the costa (fig. 9); 3rd posterior vein not reaching half-way to margin of wing; vein between the discal and 5th posterior cells a little longer than anterior cross-vein; distance from the margin of the confluence of the 5th and 6th veins nearly three times the length of anterior cross-vein. Anal angle strongly curved.

Halteres pale yellow.

Abdomen with 7 segments, of equal width throughout, almost as wide as thorax, with a vestiture of dense pale-yellow hairs along the sides and short hairs on dorsal surface; 1st segment blackish-brown but for a central tawny part extending on to the posterior margin and not separated from the colour of following segment; 2nd to 4th segments tawny, each with a narrow posterior blackish-brown band widening laterally to form a triangular spot on the sides at the posterior corners. Although along the middle this band is separated from the posterior margin by a narrow and tawny fusiform area, it extends on to the margin at the sides; 5th and 6th segments