Characters for recognition of both adult and larval specimens of Clusiidae are given. A larva from Australia is described, and some characters of the puparium of one species are noted. The morphology of the male terminalia is discussed in order to determine the homologies of the parts and to provide a sounder basis for classification. It is shown that those genera which have been sufficiently investigated can be distinguished from one another by characters of the male postabdomen. The geographical origin of the Australian forms is discussed. Keys to the genera of Clusiidae, to all described species of Allometopon and to the Australian species of other genera are provided. Two genera and 19 species are described as new.