Palpi short, 4-segmented. Mouthparts form short proboscis or reduced. Laterotergites and mediotergite setose. Wing membrane with macrotrichia. Sc long, ends at C. Costa produced beyond R5, not reaching wing apex. M1 absent. M2 reduced at the base. RS base transverse. M3+4 and CuA fork stalked. Hind coxae shorter than fore and mid ones. Male genitalia simple.