Abstract
A new family Peradeniidae is proposed for Peradenia, gen. nov., comprising P, clavipes, sp. nov. and P. micranepsia, sp. nov. from south-eastern Australia. Peradeniidae is assigned to the proctotrupoid complex of parasitic wasps, as the sister group of the Heloridae. Extant proctotrupoid families of the world are compared with respect to 43 morphological and biological characters, and an illustrated key to families is provided.