Mature larvae of five species representing each of the three principal groups within the genus Megachile sensu lato (i.e., including Creightonella and Chalicodoma, which are often recognized at generic rank) are described and are revealed to be quite similar to one another. On the basis of their descriptions a larval description of the genus is formulated. This, in turn, is compared with and found quite similar to a previously published Preliminary Description of Mature Larvae of the Megachilini based on study of larval representatives of the three genera in the tribe: Megachile, all species of which are pollen-collecting, and Coelioxys and Radoszkowskiana, both of which are cleptoparasitic, usually with Megachile hosts.