Hirrius Bolivar 1887

A key to genera hitherto assigned to Hirrius 1A) Antennae with widened segments......................................................................... 2 1B) Antennae filiform. (Apterous. Vertex as wide as an eye or narrower. In Mindanao.)............................................................................... Parahirrius Skejo, Patano et Kasalo gen. nov. (2 species, both new) 2A) Antennae with smooth margins.......................................................................... 3 2B) Antennae with toothed margins. (In Sulawesi)... Zvierckia Skejo, Tumbrinck et Pushkar gen. nov. (3 species, of which 1 new) 3A) Pronotum flat. Vertex as wide as an eye. (In Mindanao)................ Hirrius Bolívar, 1887 (3 species, of which 1 new) 3B) Pronotum with a hump. Vertex wider than an eye. (In Sulawesi)................................................................................................ Guentheracris Skejo, Tumbrinck et Pushkar gen. nov. (1 species)