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 4(3)

Dorsum with row of small, submedian tubercles on each side; tubercles comprising an area of elongate-ellipsoid sensillae; body coloration usually uniformly dark...Bl. tuberosa Courtney	Dorsum with row of prominent, median tubercles, one per abdominal division; body coloration either "pie-bald" or uniformly pale...5