Edia semiluna is a moth in the family Crambidae. It was described by John Bernhardt Smith in 1905.[1] It is found in southern Arizona and Mexico.
The length of the forewings is 8–10 mm.[2] The ground colour of the forewings is white with a faint olivaceous tinge. The basal area is olivaceous brown from the costa to the inner margin. The hindwings are white, with a smoky margin.[3] Adults have been recorded on wing in May, August and October.[4]