Renter: Existing cavities: two nests have been observed by Mavromoustakis (1948) attached to the undersurface of a stone with 3 and 5 cells.
Nesting material: Cells are entirely constructed with very small pebbles cemented together with chewed leaves. The small cavity between the stone and the soil was observed to be sealed with the same material. (Mavromoustakis, 1948)