Australimyza mcalpinei Brake & Mathis, 2007

Head: frons and orbital plates gray or brown microtomentose, anterior margin yellow or reddish, eye margin brownish; orbital plates broad

Thorax: with brown microtomentum; six irregular rows of acrostichals between dorsocentral lines; prescutellar seta about 0.5 length of posterior dorsocentral seta

Wing: length 1.5-1.9 mm, wing width 0.6-0.7 mm; base of knob of halter yellow, apex brown

Legs: yellow to brown or dark brown gray, except for bases, apices and tarsi, which are yellowish

Male abdomen: surstylus triangular with narrow elongate tip, covered with several sensilla, about as long as epandrium; postgonite blade-like with round tip, about 1.3x as long as surstylus; basiphallus U-shaped, U slightly longer than fork of phallapodeme; cercus nearly twice as broad as tip of surstylus

Female abdomen: sternites 2-5 yellow, posterior sternites progressively darker; tergite 7 shiny, without microtomentum except for anterior margin.

There is significant variation in the colour of specimens, with legs, for example, ranging from yellow to dark brown gray. We assume that all mentioned specimens belong to a single species, because structures of the male genitalia are the same. However, there are several specimens of a very light-coloured variety, which we do not include in the type series, because they may represent a separate species. In this variety the frons, orbital plates and thorax except for the notopleuron are light gray microtomentose, the legs are yellow except for the brownish hindfemur, and the postgonite is sculptured slightly differently from the type series. Interestingly on Tasmania, where both varieties occur, the darker variety is extremely dark, much more so than specimens from the Australian mainland. (Brake & Mathis 2007)