New oribatid mite species, Crotonia ovata sp. n. and C. tryjanowskii sp. n. are described from Australia (Tasmania and New South Wales respectively) from temperate rain forest and Nothofagus moorei forest. An identification key for adults of the six Crotonia species of Australia is included. New records of some species of crotonioid mites (Crotonioidea) from the Australian region are given. The first record of Holonothrus artus OLSZANOWSKI from the eastern Hemisphere (so far only noticed in Chile) is worthy of notice.