Catoryctis mediolinea is a moth in the family Xyloryctidae. It was described by Thomas Pennington Lucas in 1894. It is found in Australia,[1] where it has been recorded from New South Wales and Queensland.
The wingspan is about 22 mm. The forewings are whitish ochreous with fuscous bands on the veins and a broad median snow-white band from the base narrowing sharply to a point at five-sixths. The hindwings are light ochreous.[2]