Tirathaba purpurella is a species of moth of the family Pyralidae.[1] It was described by George Hampson in 1917. It is found on the Louisiade Islands in Papua New Guinea.[2] [3]
The wingspan is about 38 mm. The forewings are purple suffused with fuscous, the veins streaked with fuscous and with a rufous discoidal spot. The hindwings are greyish fuscous, somewhat ochreous towards the base.[4]