Family Pergidae. Subfamily Perginae.
Refer here for diagnostics- https://southernforestlife.net/notes/2024/6/26/perga-species-identification
Males of Perga dorsalis can not be visually separated from males of Perga affinis. Females of the two species can be separated by study of the shape and density of the hairs along the ovipositor sheath.
Perga dorsalis is listed in the following regions:
Canberra & Southern Tablelands | Southern Highlands