Hemichroa australis is a species of sawflies in the family Tenthredinidae.
Hemichroa australis can reach a length of about . Head and thorax are bright red, while the mesopleuron and the abdomen are shiny black.
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).
This species can be found in most of Europe.