C. leptospermi n. sp.

A rather small, short-bodied, immaculate fly with the anal angle and alula of the wing well developed.

♂. Eyes bare, holoptic, somewhat coppery; long black erect hairs on vertex; front and ocellar triangle bronzy, the former clothed with silvery or greyish hairs; lunular area shiny dark-blue, unusually large and semicircular. Antennae short, broadly separated at insertion, and lying flat on face (fig. 14); 1st and 2nd joints bare, bronzy, together a little longer than the 3rd, which is short, orbicular, and reddish-brown; arista reddish-brown, short and thick but abruptly tapering apically. Face bronzy-black with a dense greyish pubescence and scattered silvery hairs, the protuberances bare; face (fig. 15) descending slightly forward beneath antennae and thence abruptly outward to the prominent knob, below which at the oral aperture is a truncated protuberance which, in front view, is cup-shaped and divided by a perpendicular median ridge; below this, on each side, the lower angles of the face are rounded, swollen, and somewhat descending; oral margin shiny blue-black; a shiny blue-black stripe running diagonally forward from the cheeks at oral margin on to the face between the orbits and anterior oral margin; cheeks blue-black clothed with a greyish tomentum and scattered silvery hairs; occiput shiny deep blue; proboscis and palpi blackish-brown.

Thorax and scutellum shiny cupreous, the sternopleurae rather blackish blue; dorsum clothed with short white hairs, becoming longer on the meso- and ptero-pleurae; pleurae with a greyish reflection. Legs purplish-black and coppery, somewhat shiny; the tibiae, which are rather swollen apically, are brown at extremities; knees brown; on the underside of the anterior