Renter: Existing cavities; Dead Wood nester. Nests mainly in beetle emergence holes in dead wood. Banaszak & Romasenko (1998) also report the species utilizing vacated galls of Diplolepis mayri on Rosa canina, and hollow dry stems. The cell partitions are made of clay or sand. (Banaszak and Romasenko, 2001; Stoeckhert, 1929; Westrich, 1989; Stanisavljević, 2000).