Izatha mesoschista is a moth of the Oecophoridae family. It is endemic to New Zealand, where it is found throughout the North Island, except the Aupouri Peninsula, Hawkes Bay or the Wairarapa. The wingspan is 15.5–21 mm for males and 17–25 mm for females. Adults are on wing from October to February. Larvae have been reared from Populus species, presumably from the dead wood, and another from pine logs.