Review of the Australian species in the Ptilodactylidae genus Byrrocryptus Broun (Insecta; Coleoptera)

The Australian members of the ptilodactylid genus Byrrocryptus Broun are revised based on material from Australian collections. Nine new species are recognized: Byrrocryptus amnigenous sp. nov., B. athertonensis sp. nov., B. bouloumba sp. nov., B. capeensis sp. nov., B. castratus sp. nov., B. lewisae sp. nov., B. monteithi sp. nov., B. murraensis sp. nov. and B. weiri sp. nov. The four species described by Carter are found to be valid species: B. nigrinius (Carter, 1936), B. oblongus (Carter, 1930), B. serraticornis (Carter, 1929) and B. variegatus (Carter, 1935). The species are restricted to forested areas of the east coast from Cape York to the Otway Ranges in Victoria. A key is provided to the species and the male genitalia of all species are illustrated as well as the first four antennomeres of male and females of most species and selected pronota.