Eocene Orthoptera from Green River Formation of Wyoming (USA)
A review of fossil Orthoptera from Green River Formation of Wyoming (Middle Eocene) is given. <i>Pterotriamescaptor</i>?<i> americanus</i> sp.n., <i>Eomogoplistes longipennis</i> gen. et sp.n., <i>Pteromogoplistes grandis</i> gen. et sp.n., <i>Eogryllus unicolor</i> gen. et sp.n., <i>E.</i>?<i> elongatus</i> sp.n., <i>Eozacla arachnomorpha</i> gen. et sp.n., <i>E. problematica</i> sp.n., <i>Eotrella mira</i> gen. et sp.n., <i>Tettoraptor maculatus</i> gen. et sp.n., <i>Eotettix unicornis</i> gen. et sp.n., and <i>Eoerianthus eocaenicus</i> gen. et sp.n. are described. Two species, <i>Pteromogoplistes smithii</i> (Scudder, 1890), comb.n. and <i>Pronemobius tertiarius</i> (Scudder, 1878) are restudied on the base of new material possibly belonging to these species; systematic position of them and of <i>Eoerianthus</i>? <i>multispinosus</i> (Scudder, 1890), comb.n. is clarified. Some general remarks on the Orthoptera fauna of Green River Formation are made.