 This insect has glands that produce several forms of wax; some glands produce water-repellent wax that keeps the air passages leading to the spiracles open.Other glands produce long white filaments of wax that serve a function in the construction of the sac that surrounds the eggs.To avoid getting contaminated by its own honeydew, the scale insect has a six-bristled mechanism close to the anus, with which it can flick away its excrement.