Orocrambus aethonellus is a moth in the family Crambidae. It was described by Edward Meyrick in 1883. It is endemic to New Zealand. O. aethonellus has been recorded from the South Island. The habitat consists of sandhills and bogs at sea level, up to altitudes of about 1,200 meters. The wingspan is 13–20 mm for males and 15–21 mm for females. Adults have been recorded on wing from late October to late January. References Crambinae Moths described in 1883 Taxa named by Edward Meyrick Endemic fauna of New Zealand Moths of New Zealand Endemic moths of New Zealand