Key to Instar IV Larvae of Eastern Nearctic Blepharicera (Bl. tenuipes species-group)

Couplets: 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  

Couplet 2

Anal division distinctly tri-lobed, the medial lobe elongate & tapered apically [tributaries of upper Cataloochee Ck, GSMNP]...Bl. caudata Courtney	Anal division not distinctly tri-lobed, the medial lobe never elongate...Bl. magna Courtney