The purpose of this application, under Article 23.9.5 of the Code, is to conserve the name Papilio danae Fabricius, 1775 (Lepidoptera, pieridae) which, as Colotis danae, is well-established as the valid name for a common and widespread butterfly with many subspecies in circa 50 countries in Africa, Arabia, and Asia. The name is threatened by the primary homonym Papilio danae Hufnagel, 1766. It is proposed that Hufnagel's name be suppressed for the purposes of the Principle of Homonymy under the plenary power of the Commission, in the interest of nomenclatural stability.