Couplets: 1  2  3  4  5  6  7  8  9  

Key to Adults of Holarctic Blephariceridae: Couplet 9(7)

Lateral edge of abdominal tergite II touches substrate; respiratory organ usually with tuft of pale, silky hair-like structures near inner edge and without fold at base; respiratory organ comprised of 4 lamellae, median lamellae usually not band-shaped...Liponeura Loew

Lateral edge of abdominal tergite II widely separated from substrate by alar sclerite (Fig. A); respiratory organ without silky hair-like structures near inner edge, with fold in front of respiratory lamellae (Di. djordjevici Komárek [Fig. B]), or respiratory organs rising from conspicuous integumental field (Di. vernus Guidicelli, Di. sarduous Zwick); respiratory organ comprised of 4 or 6 lamellae, the median lamellae band-shaped, narrow (Fig. C)...Dioptopsis Enderlein