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

Key to Adult Males of Eastern Nearctic Blephariceridae: Couplet 12(11)

Posterior margin of cercus with pronounced, ventrally curved lobe apically; scutum and thorax mostly yellowish to light brown...Bl. tenuipes (Walker)	Posterior margin of cercus with indinstinct lobe near inner margin, giving the appearance of a small posteromedian notch; scutum and thorax mostly dark brown...Bl. appalachiae Hogue and Georgian