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 1

Lateral processes on anal division pointed apically; body large (instar IV > 6mm)...2	Lateral processes on anal division blunt apically; body usually small (< 6mm)...3