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 17âÂÂ22 mm. Adults are on wing from October to January.