Hypopta pallidicosta is a moth in the Cossidae family. It is found in Brazil (Parana). The wingspan is about 24 mm. The forewings are white from the costa to near the apex, shaded with dark brown below through the cell and to apex. The basal half of the wing and the inner margin is shaded with reddish brown, otherwise the wing is pale grey with about seven broken transverse brownish lines. The hindwings are white.