Systematics of the parasitoid wasp genus Aulacus Jurine (Hymenoptera: Evanioidea: Aulacidae) from Australia.

The Aulacidae is a small family of Hymenoptera that are parasitic on wood-boring beetles and wasps. They have a worldwide distribution but are generally poorly studied, particularly for the southern hemisphere. This study is part of a series that aims to describe the Australian fauna which is relatively species-rich compared with other regions. We describe 39 new Aulacus species from eastern mainland Australia and Tasmania: A. anici Jennings Austin, sp. nov., A. aquilus Jennings Austin, sp. nov., A. bamagensis Jennings Austin, sp. nov., A. bashfordi Jennings Austin, sp. nov., A. bicolor Jennings Austin, sp. nov., A. boonanghiensis Jennings Parslow, sp. nov., A. brabyi Jennings Austin, sp. nov., A. broadi Jennings Austin, sp. nov., A. burnsi Jennings Austin, sp. nov., A. confusus Jennings Parslow, sp. nov., A. dandenongensis Jennings Austin, sp. nov., A. deansi Jennings Austin, sp. nov., A. doddi Jennings Austin, sp. nov., A. froggatti Jennings Austin, sp. nov., A. glorious Jennings Parslow, sp. nov., A. hackeri Jennings Austin, sp. nov., A. insularis Jennings Austin, sp. nov., A. jamberoo Jennings Parslow, sp. nov., A. kittelae Jennings Austin, sp. nov., A. kiwarrakensis Jennings Austin, sp. nov., A. leai Jennings Austin, sp. nov., A. mareebaensis Jennings Austin, sp. nov., A. naumanni Jennings Austin, sp. nov., A. nebo Jennings Austin, sp. nov., A. neboissi Jennings Austin, sp. nov., A. obcordellus Jennings Parslow, sp. nov., A. pallidus Jennings Austin, sp. nov., A. quickei Jennings Austin, sp. nov., A. rieki Jennings Austin, sp. nov., A. scitulus Jennings Parslow, sp. nov., A. simsoni Jennings Austin, sp. nov., A. smithi Jennings Austin, sp. nov., A. tasmanicus Jennings Austin, sp. nov., A. tiernyi Jennings Austin, sp. nov., A. umbackae Jennings Austin, sp. nov., A. walkeri Jennings Parslow, sp. nov., A. warraensis Jennings Austin, sp. nov., A. willamsi Jennings Austin, sp. nov., and A. wrightae Jennings Austin, sp. nov. We also redescribe 14 species: A. albimanus (Kieffer), A. aroueti (Girault), A. atriceps Kieffer, A. elegans (Kieffer), A. festivus (Kieffer), A. flavicornis (Kieffer), A. flavimanus (Kieffer), A. fuscicornis Cameron, A. longiventris (Kieffer), A. minutus Crosskey, A. pallidicaudis (Cameron), A. planiceps (Szépligeti), A. truncatus (Kieffer), and A. vespiformis (Kieffer). As well, A. nigriventris (Kieffer) is synonymised with A. albimanus (Kieffer) syn nov. This brings to 60 the total number of species known from Australia (71 for the Australian region), although one species, A. biroi (Szépligeti), remains incertae sedis. A key to Australian Aulacus species is presented, along with notes on taxonomic history and host relationships.