Nye (1975) stated:-
N. fastuosa was proposed as the objective replacement name for Phalaena hieroglyphica Cramer, 1777, Uitlandsche Kapellen 2: 81, 151, pl. 147, fig. D, which was spelled * Hyroglyphica on page 81 but was corrected as a printer's error, on page 151 to hieroglyphica. It thus became a junior primary homonym of Phalaena hieroglyphica Drury, 1773, Illust. nat. Hist. 2: Index, 3, -Lepid., Noctuidae, Catocalinae.
N. fastuosa is a junior subjective synonym of Bombyx festiva Fabricius, 1775, Syst. Ent. : 579.
See also: Diphthera Hübner, .
Poole (1989) included EUGLYPHIA Hübner, 1820; DIPHTERA Stephens, 1850; and NOROPSIS Guenée, 1852 as junior synonyms of DIPHTHERA Hübner, 1809.
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