The following genera are treated: Ennya Stål, Gelastogonia Kirkaldy, gen.rev. and Notogonia, gen. n.; six new species are described and some nomenclatural changes introduced, as follow: 1) Ennya Stål, 1866 = Mille Stål, 1867, syn.n.; E. conica (Fairmaire, 1846) = Oxygonia accuminata Buckton, 1903, syn.n., (Lectotype of E. conica here designated); E. dorsalis (Fairmaire, 1846) (Lectotype here designated); E. ecuadorensis (Fowler, 1894) sp.rev.; E. fasciata (Fallou, 1890) sp.rev.; E. maculicornis (Fairmaire, 1846), comb.n., (Lectotype here designated); E. rufomaculala Fallou, 1890, comb.n. = E. chlorisans Breddin, 1902 = E. nebulosa Breddin, 1902 = Gelastogonia funkhouseri Goding, 1928, syn.n.; E sobria (Walker, 1851), sp.rev., = Thelia perfecta Walker, 1858, syn.n. = Hile sulphured Butler, 1877, syn.n. = Hile limbispina Breddin, 1901, syn.n.; E. bordoni, sp.n. (from Peru); E. colombiana, sp.n. (from Colombia); E. andina, sp.n. (from Peru). 2) Gelastogonia Kirkaldy, 1904, gen.rev. = Ecuatoriana Goding, 1920. syn.n.; G. bicristata (Stål, 1869), comb.n. = Ecuatoriana bactriana Goding, 1920, syn.n.; G. pulchella (Funkhouser, 1914), comb.n.; G. rufipes (Fairmaire, 1846), comb.n.; G. parva, sp.n. (from Argentina). 3) Notogonia, gen.n. (Type species: Hemiptycha erythropus Burmeister, 1835); N. costigera (Butler, 1878), sp.rev., comb.n. = Gelastogonia hirsuta Haviland, 1925, syn.n.; N. erythropus (Burmeister, 1835), comb.n. = Oxygonia altifrons Walker, 1851, syn.n.; N. rufiventris (Germar, 1821), comb.n. = Membracis signala Germar, 1821, syn.n., = Aconophora interna Walker, 1851, syn.n. = Thelia notala Walker, 1858, syn.n. = Oxygonia patruelis Stål, 1862, syn.n.; N. sinopae, sp.n. (from Brazil); N. conicornua, sp.n. (from Brazil).
Homoptera; Membracidae; Smiliinae; new species; taxonomy