Nest of Mason Bee (IMAGE) Pensoft Publishers Caption This is the nest of P. grandiceps after emergence of imagines, visible trapped between their natal nest and a nest of Megachile maxillosa. Credit Peter Alexander Roosenschoon Usage Restrictions CC-BY 4.0 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.