This bee's nest architecture is described by Sakagami and Michener (1962). From Sakagami and Michener (1962): Nest architecture is Type IVc: The cells are oriented vertically, excavated in the floor of a flat area created by expanding the main burrow horizontally. Between one and three clusters may occur. Cells are arranged in combs. Banks are the only known substrate used for nesting. Number of cells in the nest: 4-20, average 8.5.. Number of females in the nest: 1-5