Renter: Existing cavities Friese (1921) reports on the nesting behaviour after the observations of Schmidt, who used trap nests (lengths of bamboo) and documented the use of resin for cell partitions and closures and the existence of thin cocoons spun by the larvae. In one nest 8 brood cells were counted. There was no empty ante-cell. Eclosion from this nest occurred two months after final closure (Strudwick & Jacobi, 2018)