They are up to 3 mm long. Some species are covered with fluffy wax and others have long, tails of fluffy wax.
Male mealybugs are tiny, gnatlike insects with two wings and long tails of white wax.
Mealybug eggs are very small but are covered by a conspicuous dense, fluffy, white mass of wax called the ovisac. Very young nymphs are flat, oval and yellow. Older nymphs of some species are covered with fluffy, white wax. Biology Mealybugs are pests of ornamental crops indoors and outdoors across the world. They are most active in warm, dry weather.