This species is black with a blue tint and lighter pruinescent covering. The legs are entirely black. The haltere knobs blackish and the wing crossveins are not clouded. The antennae black with the arista plumose. There are 4 pairs of postsutural dorsocentral bristles and well developed presutural acrostichal bristles are present. Bodylength around 7mm. Only the male is described and is notable for having eyes well separated. H. australasiae belongs to a complex of similar looking species, all others of which either not fully ascribe to the aforementioned characters or are poorly described.