Orocrambus horistes is a moth in the family Crambidae. It was described by Edward Meyrick in 1902. O. horistes is endemic to New Zealand, where it has only been recorded from the Chatham Islands. The wingspan is 25–29 mm. Adults have been recorded from December to January. References Crambinae Moths described in 1902 Moths of New Zealand Endemic fauna of New Zealand Taxa named by Edward Meyrick Endemic moths of New Zealand