Couplets: 1  2  3  4  5  6  7  8  9  10  11  12  13  14  

Key to Adult Males of Eastern Nearctic Blephariceridae: Couplet 4(3)

Posterior margin of cercus with small process near inner edge and prominent, triangular lobe near outer margin; cercus and epandrium set with few, mostly short setae...Bl. gelida Courtney	Posterior margin of cercus with elongate, pointed process near inner edge and more-or-less rectangular near outer margin; cercus and epandrium set with numerous, elongate setae...Bl. hispida Courtney