Abstract
Two new species of Omorgus Erichson, O. capillamentis and O. incognitus, from north-eastern Australia are described. The former is an unusual, rotund flightless (brachypterous) species which is character- ised by plumose glands covering the clypeus and pronotum; the latter is a more typical winged species. This brings the total number of Australian Omorgus species to 55. The new species are illustrated by photographs of habitus and aedeagi. A distribution map for the new species is provided. Australia is the continent, after Africa, with the second largest Trogidae fauna. The number of described species currently stands on 53, of which two were introduced (Scholtz 1986a). Although their taxonomy is reasonably well documented (Scholtz 1986a) most other aspects of the species' natural history are poorly known. All native species belong to the genus Omorgus Erichson, as does one of the introduced species, O. suberosus Fabricius, a New World native which is now fairly widespread in eastern and south-western Australia. The other exotic species is the virtually cosmopolitan Holarc- tic species, Trox scaber (Linnaeus), which has established in
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