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

Key to Adults of Holarctic Blephariceridae: Couplet 7(6)

Cross-vein bm-cu present and eyes divided...Dioptopsis Enderlein, Asioreas Brodsky, Agathon von Röder (aylmeri group)	Cross-vein bm-cu absent or, if present, eyes simple...8