Labiobaetis, character states of selected characters: a–c setae of the submarginal arc on the dorsal surface of the labrum, a simple b feathered c clavate; d–f distolateral process at scape of antenna, d absent e poorly developed f well developed; g–j labial palp, distomedial protuberance of segment II, g lobed h thumb-like i slender thumb-like j hook-like; k–n labial palp, shape of segment III, k oblong, distally with small projection l slightly pentagonal, distally slightly pointed m approx. semicircular n conical, distally slightly truncate; o–q distolateral excavation at maxillary palp segment II, o well developed p poorly developed q absent; r–u hypopharynx, medial tuft of stout setae, r well developed, long s well developed, average length t well developed, short u poorly developed; v–y hindwing pads, v absent w minute x small y well developed; z1, z2 paraproct, z1 distally not expanded z2 distally expanded.