clothed as the dorsum; 4 large and hairy spines, black toward the base and reddish-brown distally. In one specimen (♀) close to the base of and beneath both the 2 left-hand spines is a supernumerary spine not much shorter in length. In the ♂ the spines are lighter in colour. Halteres pale grey, sometimes with darker heads.

Posterior legs much longer than the others, their femora club-shaped being distally thickened, bluish-black but for the whitish proximal part; the middle and anterior femora not much more than half the length of the posterior, proximally whitish but otherwise of a more brownish black, the knees tending to brown. Posterior tibiae robust but not distally enlarged, bluish-black and proximally whitish; the remaining tibiae brownish-white, especially distally. Protarsi fully half as long as the whole tarsus; anterior and middle tarsi brownish-white, darker distally, the posterior of a smoky-grey colour. The posterior protarsus of the ♂ is almost white in colour and has a dark spot at the origin; the remaining joints are darker.

Wings deeply clouded with brown between a line through the base of the discal cell and the apex of the wing; axillary angle not sharply curved. The clear spaces are as follow: the articulation; costal cell, except distally at the costa; 1st basal cell, except the spurious vein when present, and 2nd basal cell; a space across the 1st submarginal cell from the costa to the 3rd vein, the proximal edge of which space being in line with termination of 2nd vein and the distal edge in line with origin of anterior branch of 3rd vein, 1st posterior cell slightly lighter along the centre, 2nd to 5th posterior cells distinctly lighter in the centre; discal cell with a faintly lighter space just below the middle line. The anal and axillary cells slightly clouded, the marginal cell very dark, the remainder of the colouring lighter. Costa along the costal cell but slightly outcurved, this cell is thus not widened to any extent; 2nd longitudinal vein gently curved except distally where it meets the costa; anterior cross-vein and 3rd longitudinal having a common origin from the 2nd longitudinal, the 1st section of which being about as long as the anterior cross-vein, which is almost straight and a little posteriorly oblique; 3rd longitudinal distinctly upcurved and in the last section downwards, which is about three-quarters the length of the 1st section (fig 3); in consequence of the curve of the 3rd vein the anterior branch is comparatively short, being twice as long as the anterior cross-vein; this branch is oblique, arising at an acute angle and more or less distinctly curved to the costa. The 1st submarginal cell is proximally both acute and narrow. Vein between discal and 5th posterior cells straight and about one and a half times the length of anterior cross-vein. A spurious longitudinal vein, sometimes represented by a delicate cloud, along the middle of the 1st basal cell. Of the 4 posterior veins from the discal cell the 3rd reaches three-quarters of the distance to the posterior margin of the wing. The confluence of the 5th and 6th longitudinal veins about three times the length of the anterior cross-vein from the margin.

The abdomen is elongate, fusiform in the ♀, linear and restricted along the middle in the ♂; in the former as broad as thorax beyond the middle, but not broader or as broad as the thorax in the latter; the whole deep shiny-blue with a faint tinge of purple in certain lights. There is a short vestiture of silvery hairs, longer laterally, and so arranged on the posterior margin of each segment as to present a banded appearance. In the ♂ those bands are more or less brown. The abdomen is 7-segmented.

The ♀ genital organs are represented by a pair of 2-jointed tawny styles projecting slightly upwards and arising from the sides of a central dome-shaped tawny plate.