Pariaconus nigricapitus and Pariaconus proboscideus immatures. A–EP. nigricapitus: A 5th instar with anal ring detail (inset below) and enlarged cells marking ventral tissue mounds (inset right) B detail of fused marginal setae C dry mounted specimen showing domed structure (lateral view above, dorsal view below) D tarsi E antenna F–KP. proboscideus: F white, hedgehog-like appearance of live specimens G detail of dorsal sectasetae (stained) H tarsi I antenna J 5th instar K 5th instar abdomen with anal ring detail (inset).