Metathrinca illuvialis is a moth in the family Xyloryctidae. It was described by Edward Meyrick in 1914. It is found in Assam, India.[1]
The wingspan is about 26 mm. The forewings are whitish ochreous, with a faint grey tinge and with the costal edge dark fuscous towards the base. There is a submarginal series of seven large black dots around the apex and termen. The hindwings are ochreous whitish.[2]