Stangeia rapae is a moth of the family Pterophoridae that is found in French Polynesia (Rapa Island).
The wingspan is 13-. The head is grey with scattered white scales. The thorax is grey, but posteriorly creamy white with three longitudinal pale, clay-coloured lines. The forewing ground colour is grey, dorsally suffused pale brownish. The hindwings are greyish fuscous.[1]
The larvae feed on Sigesbeckia orientalis. They feed in the inflorescence of their host plant. Pupation takes place on the flower stalks or very small leaves.