Lygistorrhina urichi
Male: Head (including antenae) black, antennae scarcely longer than head; proboscis brorvnisl). Thorax uniformly shining black. Abdomen very long and thin, swollen apically; black, with well-marked yellow apical bands on the first five segments. Legs: front coxae with the base fuscous, the apes and trochanters yellowish; mid and hind coxae and trochanters shining black; fore and mid femora and tibia yellowish ; hind femora swollen, yellow, with the apical two-fifths black; hind tibia: yellow, aplcal fith black, swollen on the apical half, a close-set row of stiff hairs along the wliole of the upper surface; fore and mid tarsi brownish black, hind tarsi black, appearing thickened through being clothed with short very derlse hair. Wings almost hyaline; a distinct brown blotch at the apex, darker in colour towards the costa. Halteres yellow.
Female: Resembles the male, but the eyes are much smaller and the front much broader; abdomen much shorter and rather stouter, and the yellow bands less distinct; apical half or rather more of hind femora brownish black.
Male: Length 5-6 mm.
Female: Length 3.5 mm.