There are no vestiges of hind-limbs or of the pelvis.
In many beetles the hindwings are reduced to mere vestiges useless for flight, or are altogether absent, and in such cases the two elytra are often fused together at the suture; thus organs originally intended for flight have been transformed into an armour-like covering for the beetle's hind-body.
I've left vestiges of my activities along the roadsides of America and yet, they don't know I exist!
7 Vestiges of the Molten Globe (London, 1875).
There is no renal portal system, excepting unimportant vestiges of such a system in the head kidneys.