Metathrinca parabola is a moth in the Xyloryctidae family. It was described by Meyrick in 1914. It is found in southern India. The wingspan is about 25 mm. The forewings are silvery-white with the costal edge dark-fuscous towards the base and the dorsal area tinged with ochreous. There is a submarginal series of blackish dots around the apex and termen, that between veins 5 and 6 is absent, one on each side of this minute, one above the apex and two nearest the tornus large. The hindwings are ochreous-white.