Five new species of Birubius Barnard and Drummond, 1976 (Crustacea: Amphipoda: Phoxocephalidae)are reported: B.drummondae sp. nov and B. heislersi sp. nov from Victoria, Australia; B.wallisae sp. nov. from Queensland, Australia; and B. lowryi sp. nov., and B. wilsoni sp. nov. from Papua New Guinea. The present records extend the range of he genus previously reported from Australia and Indonesia. The genus Birubius is discussed and compared with he Australian genera Tickalerus Barnard and Drummond, 1978 (monotypic), Kulgaphoxus Barnard and Drummond, 1978 (two species) and Yan Barnard and Drummond, 1978 (two species) in light of the new species exhibiting a combination of characters from all genera. Their synonymy is foreshadowed.