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

Key to Larvae of Holarctic Blephariceridae: Couplet 6(4)

Anal division semicircular; anal proleg reduced, without rudimentary sole...Neohapalothrix Kitakami	Anal division of variable shape but always with lateral or caudal appendages...7