Case 239: Tibicina Amyot, 1847 and Lyristes Horvath, 1926 (Insecta, Hemiptera, Homoptera): proposed conservation by the suppression of Tibicen Berthold, 1827. Z.N. (S.) 239 - Melville, R V; Sims, R W (Bulletin of Zoological Nomenclature, 1984)