Cephalopharyngeal skeleton (CPS) of Liopiophila varipes (Meigen) larva. 6. 7 CPS of first-instar larva, scale bar 0.005 mm; 8, 9 CPS of second-instar larva, scale bar 0.1 mm; 10, 11 CPS of third-instar larva, scale bar 0.25 mm; dbr – dorsal bridge; dcor – dorsal cornua; isc – intermediate sclerite; lbr – labrum; lsc – labial sclerite; mhk – mouth hook; pab – parastomal bar; vcor – ventral cornua; vpl – vertical plate.