It’s tough to be a bug, especially if your job is to eat away an invasive exotic species killing off trees across the country. But that’s the role of three beetle species being bred in the Predator Beetle Lab at North Georgia College & State University. At an open house Sunday, lab manager Amanda Newton gave tours showing how the lab-raised beetles are helping to combat the hemlock woolly adelgid, an insect brought to the United States from Asia that now eats and destroys Eastern hemlock trees.