Amorbaea subtusvena is a moth in the Xyloryctidae family. It was described by Diakonoff in 1968. It is found in the Philippines (Luzon). The wingspan is about 22 mm for males and 23-27 mm for females. The forewings are glossy white, with the veins thickened, raised and dull white. The costa is moderately curved at the base, more so towards the apex, the apex obtusely pointed, termen little curved and oblique. The hindwings are glossy white, with the veins yellowish tinged.