Cryptophasa rubra is a moth in the Xyloryctidae family. It was described by Meyrick in 1890. It is found in Australia, where it has been recorded from South Australia, Victoria and Western Australia. The wingspan is about 50 mm. The forewings are ochreous-red, deeper towards the costa and inner margin anteriorly. There is a dark fuscous dot in the disc beyond one-third, a second on the fold beneath the middle, a third in the disc at three-fifths, and a fourth between the second and third. The hindwings are pale yellowish-ochreous, the apex slightly reddish-tinged.