This wasp parasitises Psyllids, which can be a pest of Eucalypts. The wasp has been exported overseas as a biological control agent. Australia has numerous species in this genus.
#1. cf. Psyllaephagus
Early August 2012
Knocklofty Reserve, Hobart
Identification thanks to bleu.geo
#2. cf. Psyllaephagus
Late July 2014
Knocklofty Reserve, Hobart
Trapped on the top of a post due to a damaged wing.