About Ethmia marmorea Walsingham, 1888
Ethmia marmorea Walsingham, 1888 has forewings that measure 8.4–11.7 mm (0.33–0.46 in) in length. The forewing pattern is divided by a longitudinal line along the Cu fold. This line extends below the fold as blunt, triangular spurs at the basal one-fourth, at the middle, and in the terminal area of the wing. The dorsal area of the forewing is white, while the area costad of the dividing line is dark brown. This dark brown area usually has one or more poorly defined whitish blotches along the costa. The ground color of the hindwings is whitish at the base, becoming pale brownish across the apical half. Adult Ethmia marmorea are on wing from May to August, and there is probably one generation per year.
