Ann. Soc. Ent. France
Bysson begins the discussion with a general discussion of the nests of Megachile. They place their nests in various places (cavities). The nests are always constructed of pieces of leaves – oval ones on the walls and discs (small) forming partitions between cells and bottom. The appear to choose leaves of certain plants – but are not exclusive. Ordinarily they make more nests with more cells plants – but are not exclusive. Ordinarily they make more nests with more cells than do the Osmia. At least with the following species he noted that in all cases, the eggs to be laid gave birth to males. They gather honey principally from Carduaceae, Aliaceae, Leguminacese and some Compositae.
Buysson, R., "Identification de quelques Megachiles" (1902). Bu. Paper 70.