Rather slender to robust and rarely stout flies, sparsely to rather densely clothed with groundsetulae and sometimes very hairy, usually blackish, sometimes partly or largely yellowish to brownish in ground colour, thinly to densely covered with grey or brownish-grey microtomentum; in female usually paler and denser microtomentose and less hairy. Legs blackish, often partly or largely yellowish. Wings slightly to rather strongly tinged with yellow to brown especially basally, rarely spotted or clouded. Length 2-13.5 mm.