We do not know what they eat or why they also live with a wax scale insect.
From the scientistatwork.blogs.nytimes.com
The wax is secreted by the insect to help protect its exposed exoskeleton.
From the charlotteobserver.com
Second, they live with a wax scale insect.
From the scientistatwork.blogs.nytimes.com
The Stuttgart researchers have investigated the micromorphology, chemical composition, and mechanical characteristics of the wax and combined them with experiments concerning insect behaviour.