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 11(10)

Substernal sensillae (cluster adjacent to first sucker) dark; dorsal sensillae minute (barely visible), about as long as broad; body small (instar IV < 5mm)...Bl. diminutiva Hogue	Substernal sensillae (cluster adjacent to first sucker) light, usually yellow; dorsal sensillae well developed, usually dense, may form distinct clusters; body large (instar IV > 5mm) ...12