Hemichroa australis is a species of sawflies in the family Tenthredinidae.

[2] Hemichroa australis can reach a length of about 7–8 millimetres (0.28–0.31 in).

Head and thorax are bright red, while the mesopleuron and the abdomen are shiny black.

[3] This sawfly is similar to Hemichroa crocea, which has a bright orange abdomen and legs.

Larvae feed on alder (Alnus species) and birch (Betula species).