Cicada Nympha has skin has yellowish collor and is very tough on the surface. This skin toighness is nessesary for Cicada while its being developed underground. Since it has to borrow tunnels, its natural to have panzer like skin.

Yellowish collor may be attributed to dark conditions under the ground and as a result there is no need for skin mutation that match sarroundings like we’ll find it later when Cicada hatch and becomes an adult. When Cicada hatch, its Nympha skin splits in the middle allowing adult Cicada freely mutate into flying insect. Because of its toighness Cicada skin may be seen, long after its occupant left, attached to a tree branch of a grass.