A few groups of these were seen in April 2023. They were fluttering around for long periods on the surface of dead Sugar Gums trees.
Classification
from Australian Faunal Directory
Order Hymenoptera - Wasps, Ants, Bees and Sawflies, 12202 named species in Australia
Family Gasteruptiidae - 190 species in Australia
subfamily Gasteruptiinae
Genus Gasteruption - 114 species in Australia
Species Gasteruption cylindricum