A new species of Rattus from Gunung Mutis, South West Timor Island, Indonesia.

A new species of murid rodent is described from a single, aged individual. collected in montane forest at ca. 1900 m elevation on Timor. It is small bodied, with a bicoloured lail. 3 pairs of mammae and a distinct skull morphology. It is tentatively placed in the genus RaIlUS.