♀. Eyes bare; front brilliant cupreous, with a brilliant pink transverse reflection in front of ocellar triangle, and clothed with a sparse brown pile causing a pale-brown reflection. Face greenish-yellow, this colour extending upward on each side to a point along frontal orbits; face clothed on each side with a short yellow pile; a median blue-black stripe extending from lunular area to mouth (fig. 33); cheeks and oral margin ochreous, the former clothed with a short yellow pile which, extends over the occiput. Antennae short, brownish-yellow with darker markings particularly along the upper and front edges of the short rather truncated 3rd joint; arista dark brown; mouth-parts brown; occiput greyish-black, but in some cases tawny below, this colour extending from oral margin.

Thorax brilliant bronzy-green with a vestiture of short delicate hairs; a pale-yellow area on each side between the wing and humerus, and extending in certain lights as pale brownish-yellow over the mesopleurae; scutellum amber-yellow, clothed with delicate pale hairs. Wings clear and iridescent, the stigma brownish-yellow, veins tawny; halteres amber-yellow. Femora ochreous, but brownish distally, the posterior pair distinctly so; tibiae pale-brownish, the posterior darker centrally; tarsi brown.

Abdomen linear but somewhat broader anterior to centre (fig. 36); shiny dark-brown; delicate pale hairs on sides of 1st and 2nd segments; a pair of distinct transverse linear ochreous spots on 2nd, 3rd, and 4th segments, and a pair of indistinct brownish spots on 5th segment.

♂. Smaller and more slender than ♀; thorax shiny bronzy-black and scutellum clothed with short and scattered black hairs; the abdomen is more hairy, elongate and narrow, and the spots are broader and somewhat oblique; genitalia tawny.

♂. Length, 6 mm. ♀. Length, 9 mm.

Plesiotype: No. 1236, D. M.

Habitat.—Throughout New Zealand from August to May. The colour-markings of this species may be darker or lighter.