Cossodes is a monotypic moth genus in the Cossidae family. Its sole species, Cossodes lyonetii, is found in south-western Western Australia. The wingspan is 55–58 mm for males and about 63 mm for females. The forewings are marked with white and black and the hindwings are bluish. Adults have been recorded on wing from December to March. The larvae feed on Xanthorrhoea species.