Couplets: 1  2  3  4  5  6  7  8  9  10  

Key to Adults of Holarctic Blephariceridae: Couplet 5(4)

Vein R2+3 much longer than terminal fusion of R; head and thoracic pleurites setose in most species; antennae markedly short, typically less than twice the length of head ...Bibiocephala Osten Sacken	Vein R2+3 much shorter than terminal fusion of R; head and thorax glabrous; antennae of "normal" length, typically much longer than twice the length of head...Agathon von Röder