Cypa ferruginea is a species of moth of the family Sphingidae. It is known from Sri Lanka.
It is similar to Cypa decolor but the distal margin of the forewing is somewhat convex medially. Forewings are uniform red brown. Hindwings with the cilia white towards anal angle, which is less produced in the female than in the male.[1]
. George Hampson . The Fauna of British India, Including Ceylon and Burma: Moths Volume I . Taylor and Francis . 1892 . Biodiversity Heritage Library.