Comprised of more than 20 Australian species.
The crabronids in this tribe are easily recognisable by the eyes being distinctly notched on the inner orbits. Female Trypoxylins prey on spiders. The species are all black to black and red.
Generally robust crabronids with thick legs and large, cuboid-shaped heads. The inner orbits of the eyes usually strongly converging below towards the antennal insertions. Forewings with only one submarginal cell. The antennae are short, but the scape long (for crabronids), the latter being around a third of the overall length of the antennae. Tasmanian crabronins have the abdomen pedunculate (Podagritus and Rhopalium), or sessile (Williamsita). Various families of flies (eg. Tachinidae, Calliphoridae, Lauxaniidae, Therevidae, Stratiomyidae etc) are typically preyed upon within this tribe.
Pending ID – Crabroninae
#1. Late December 2022
Very low set antennae suggest Crabronidae, Crabroninae, Crabronini, Crabronina.Poss. Rhopalum sp
Identification and information thanks to Bernhard Jacobi
Evans, H & O’Neill, K 2007, The Sand Wasps:Natural History and Behavior, Harvard University Press, USA.
Turner, R. E. 1916. Notes on the wasps of the genus Pison, and some allied genera. Proceedings of the Zoological Society of London 1916: 591-629.