Key to genera of the Euscyrtinae from Taiwan

1. Frontal rostrum prominent over surface of vertex; antennal scape as wide as frontal rostrum; outer lateral of fore tibia without tympanum; tegmen reaching at abdominal tergum III, veins parallel; metanotal gland not concave......... Euscyrtus Guerin

- Frontal rostrum prominent not over surface of vertex; antennal scape wider than frontal rostrum; outer and inner lateral of fore

tibia with tympanum; tegmen proceeding to abdominal tergum III, veins divergent apically; metanotal gland concave...... 2 2. Metanotum without separate border; subgenital plate truncate at apex; epiphallus with cornua bilobed........ Patiscus Stål

- Metanotum with separate border; subgenital plate acute at apex; epiphallus with cornua single lobed...................................................................................................... Beybienkoana Gorochov