Phoridae

Small to minute flies about 0.5-5.5 mm long; color blackish, brownish, or yellowish. Thorax often with a characteristic humpbacked appearance. Major bristles of head, legs, and other parts of body characteristically feathered. Wing commonly large, usually hyaline to light brown, rarely with dark markings; venation distinctive, with radial veins crowded toward costal margin. Female of some species, however, with wing short or completely absent; some apterous females aberrant in form; for example tiny cockroach-like species of Aenigmatias Meinert difficult to recognize as Diptera and especially as phorids. (Peterson 1987, Disney 1998)