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 15(14)

Body coloration: dark medial band, with lateral margins extended onto dorsum of proleg; lateral muscle scars usually well inside the margins of these bands; pale crescentic band near apex of proleg; cranial sclerites usually with contrasting color pattern, with anterior half dark and posterior half light; if cranial sclerites with only small light bands, they extend perpendicular to frontoclypeal apotome; dorsal sensillae arranged in transverse anterior and posterior clusters...Bl. coweetae Hogue & Georgian

Body coloration: uniformly dark or, if with dark medial band, the lateral margins not extended onto the dorsum of proleg; lateral muscle scars at margins of these bands; apex of proleg without pale crescentic band; if cranial sclerites with contrasting color pattern, light bands typically extend parallel to frontoclypeal apotome; dorsal sensillae arranged rather diffusely over segment, not in transverse anterior and posterior clusters...Bl. williamsae Alexander