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

Key to Larvae of Holarctic Blephariceridae: Couplet 8(7)

Clypeus transverse, shield-like; posterodorsal margin of cranium with excisions; appendage of anal division subrectangular...Hapalothrix Loew	Anterior margin of clypeus not shield-like; posterodorsal margin of cranium entire, without excisions; appendage of anal division elongate and projecting posteriorly...Bibiocephala Osten Sacken