Tiny (1/8") black Ladybugs, these Mealybug Destroyers (Cryptolaemus montrouzieri) are originally from Australia, and are one of the oldest and most successful of biological controls.
Application: Just shake them onto plants right from the container they arrive in. We recommend 2-5 Mealybug Destroyers per infested plant. They have large appetites for such a small insect. A few will go a long, long way.