Austrotritia lebronneci (Oribotritiidae) is redescribed from New Caledonia. Two new species of Euphthiracaridae are described from the Australian Region: Acrotritia cunangra sp. nov. from Australia and Microtritia stria sp. nov. from New Zealand. Some modifications to the diagnostic characters of the genera Austrotritia and Microtritia are provided. Keys to species of Austrotritia, Acrotritia and Microtritia of the Australian Region are also proposed to facilitate identification.