Cryptolaemus montrouzieri, also known as “Crypts” or “Mealybug Destroyers” and the name says it all. Like ladybugs, C. montrouzieri are ladybug beetles. Unlike their relative, though, these beetles are not wild-collected, do not aggregate and do not disappear just after release.
Crypts, with their shiny black body and dull-orange head and thorax, definitely prefer to dine on mealybugs (especially young ‘uns). They can clean up large populations. However, as most beetles are, C. montrouzieri are very opportunistic and will eat pests other than mealybugs: other scale insects (their c rawlers or immature forms), insect eggs, etc.