10. Vein r-rs of fore wing basally thickened and abruptly curved. Clypeus with apical margin flat and often blunt, never impressed so that margin is very thin. Vein 1m-cu of fore wing arcuate or sinuous,with at most weak trace of vein stub (Holarctic, and south to southern Mexico).

10’. Vein r-rs of fore wing at most slightly broadened basally, never abruptly curved. Clypeus with apical margin impressed and thin. Vein 1m-cu of fore wing steeply curved or centrally elbowed, usually with long vein stub present (worldwide).