Syllepis semifuneralis is a moth in the Crambidae family. It was described by Munroe in 1970. It is found in Bolivia and Peru. The wingspan is about 27 mm. The forewings are black with a few white scales on the posterior margin basad of the middle. The hindwings are white, but the base and apex are black. There is a broken black subterminal line extending from the apical patch nearly to the anal angle. There is also some yellowish staining along the middle of the termen.