Liparistis monosema is a moth in the Xyloryctidae family. It was described by Lower in 1893. It is found in Australia, where it has been recorded from South Australia. The wingspan is 12-16 mm. The forewings are shining white, slightly ochreous posteriorly. The extreme costal edge is blackish towards the base and there is a distinct black spot in the middle of the wing above the anal angle. The hindwings are fuscous.