Nomenclatural changes and clarifications are provided for names in the leafhopper subfamily Deltocephalinae. The replacement names Cicadula vilbastei nom. nov., Eutettix harlani nom. nov., Macrosteles raoi nom. nov., Maiestas chalami nom. nov., Maiestas viraktamathi nom. nov., Opsius emeljanovi nom. nov., Paradorydium naudei nom. nov., Penthimia alba nom. nov., Penthimia evansi nom. nov., and Penthimia walkeri nom. nov. are given for species-group homonyms. Four new synonyms are recognized for previous replacement names that are no longer valid. The status of Acinopterus angulatus Lawson nomen protectum is discussed. Paramacrosteles Dai, Li & Chen status reinstated is reinstated as valid on taxonomic grounds. Priority is clarified for two species of Deltocephalinae, five new combinations in Balclutha Kirkaldy are given, and two original spellings are fixed.