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

Key to Adults of Holarctic Blephariceridae: Couplet 2(1)

Anal vein extending to wing margin; Rs short to nearly absent, much shorter than vein r-m; R4+5 sinuous, terminating close to terminus of R1(+2+3); antenna with 10 segments, apical segments forming a club...Apistomyia Bigot	Anal vein atrophied, not reaching wing margin; Rs longer, approximately one-half as long as vein r-m; R4+5 straight, terminating distal to terminus of R1(+2+3); antenna with 8 segments, apical segments filiform...Horaia Tonnoir