5th instar of Dictyotus caenosus (Brown shield bug)
Shield bugs are often called Stink Bugs and get their common name from the foul-smelling fluids they exude when disturbed. Both adults and nymphs have large glands that discharge underneath the body. To survive, shield bugs require a supply of bacteria which they store in intestinal pouches. The nymphs obtain a lifetime supply from deposits made on and between the eggs by the adult female when she lays them.
Nymph shield bugs go through 5 instar stages (moults) till adult.
Below are photos of the 5th instar of Dictyotus caenosus (Brown shield bug).
Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0