Deals with the true bugs (the suborder Heteroptera), including the bark bugs, stilt bugs, seed bugs, cotton stainers, burrowing bugs, shield bugs and stink bugs.

The second of 14 proposed Coleoptera volumes, is the authoritative work on the Australian native and introduced Scarabaeoidea. Of great economic importance, this group is represented in Australia by the families Lucanidae, Passalidae, Trogidae, Geotrupidae, Ceratocanthidae, Hybosoridae and Scarabaeidae. Nearly 300 genera and over 2500 species are recognised.