Orocrambus haplotomus is a moth in the family Crambidae. It was described by Edward Meyrick in 1883. This species is endemic to New Zealand. O. haplotomus has been recorded from the areas around Lake Te Anau and Lake Wakatipu in the South Island. The wingspan is 19–28 mm for males and 25–30 mm for females. References Crambinae Moths described in 1883 Moths of New Zealand Endemic fauna of New Zealand Taxa named by Edward Meyrick Endemic moths of New Zealand