Bessbug beetle larva (IMAGE) University of California - Berkeley Caption Bessbug beetles construct chambers made of frass to protect their larvae while they pupate. Credit UC Berkeley photo by Rita de Cassia Pessotti Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.