Excavator; Ground. Excavated burrows in hard-packed, sandy soil. After 2-3cm the entrance burrow ramifies in 5-6 branches, each containing one single cell or two cells separated 1-2cm from each other at about 6-8cm below soil surface; sometimes the nests contain only one cell at the end of the nest burrow.
Nesting material: The cells are entirely built of several layers of small to large pieces of sterile flowers of Centaurea or of petals of Scabiosa, Convolvulus, Anthemis or Cistus. (Cros, 1927; Ferton, 1890, 1911; A. Müller & Richter, 2018).