A new opiine (Hymenoptera, Braconidae) from Australia with discussion of Diachasma Foerster

A new species of Opiinae, Diachasma dentatum Shirley, Restuccia & Ly, is described from Australia. This species is similar to several other Australian opiines previously described or included in the genus Diachasma, but the mandibles are unusually broad, nearly exodont. Notable differences between Austra­lian and Palaearctic Diachasma are discussed. Diachasma tasmaniae Fischer, 1995, originally described from Tasmania and New South Wales, is newly recorded from Victoria. Diachasma rufipes Szépligeti, 1905 is transferred to Notiopambolus, new combination

An opiine Braconidae (Hymenoptera) reared from Richardiidae (Diptera) and recognition of a new species group of Opius s. l.

A new species of opiine Braconidae, Opius rojam Daniels and Wharton, is described from Trinidad. The description is based in part on two individuals reared from Sepsisoma erythrocephalum infesting shoots of the grass Paspalum fasciculatum. This is the first record of members of the Opiinae attacking species in the dipteran family Richardiidae. The Opius ingenticornis species group is proposed and delineated to accommodate this and several putatively related species formerly included in Opius (Merotrachys), Opius (Pendopius), and Opius (Ilicopius). A key to the species of this group is provided. Descriptions and diagnoses are referenced to the Hymenoptera Anatomy Ontology