Synonymized with Chaerocampa velata by Hampson, , Fauna Brit. India1: 91. Reinstated as a species by Rothschild & Jordan, 1903, Novit. zool.9 (suppl.): 793 (key), 795. Synonymized with Rhagastis castor as a subspecies by Holloway, 1987, Moths of Borneo3: 180. Erroneously treated as a species by Bridges, 1993, Cat. Fam. Gen. Spec. Sphingidae of the World: VIII.21. Reinstated as a subspecies of Rhagastis castor by Kitching & Spitzer, 1995, Tinea14: 191. Erroneously and implicitly synonymized with Rhagastis acuta as a subspecies and also implicitly reinstated as a species by Zhu & Wang, 1997, Fauna Sinica Insecta 11: 375. Re-synonymized with Rhagastis castor as a subspecies by Kitching & Cadiou, 2000, Hawkmoths of the world: 65.