Orocrambus melitastes is a moth in the family Crambidae. It was described by Edward Meyrick in 1909. This species is endemic to New Zealand, where it has been recorded in Southland, Otago and Westland. It is found from the subalpine zone down to sea level. The wingspan is 17–22 mm. Adults are on wing from October to January. References Crambinae Moths described in 1909 Moths of New Zealand Endemic fauna of New Zealand Taxa named by Edward Meyrick Endemic moths of New Zealand