Notes on the New World Treehopper Genera Membracis Fabricius, Enchenopa Amyot and Serville, and Closely Related Taxa (Hemiptera: Membracidae: Membracinae)

Abstract. The similarities and differences in adults and nymphs among Enchenopa Amyot and Serville, Enchophyllum Amyot and Serville, Folicarina Sakakibara, Membracis Fabricius, and Phyllotropis Stål are discussed. Leoiscyta pallula (Richter), new combination and Leoiscyta robiginosa (Richter), new combination, are both referred from Membracis. Enchophyllum imbelle Stål, Membracis carinulata Richter, and Membracis flava Richter are referred to Membracini incertae sedis, new placements. Enchenopa melaleuca Walker, reinstated combination, is referred back to its original genus from Enchophyllum. The holotype and sexual dimorphism are shown for Enchenopa monoceros (Germar). Enchenopa varians Walker is reinstated as a valid species. Because earlier workers placed Campylenchia Stål as a junior synonym of Enchenopa, but did not list all species, Enchenopa minans (Fairmaire) new combination and Enchenopa tatei Goding, reinstated combination, are proposed. For the first time, nymphs of Phyllotropis and Folicarina are figured.