Megachilinae is a subfamily of bees, the largest subfamily in the family Megachilidae, and includes mason bees, leafcutter bees, and carder bees. * Tribe Anthidiini * * Afranthidium * * Anthidiellum * * Anthidium * Anthodioctes * * * * * Bathanthidium * * * Dianthidium * * Eoanthidium * * Euaspis * * * Hypanthidium * * * * * Pachyanthidium * Paranthidium * * Pseudoanthidium * * * Stelis Panzer * Trachusa * * * †Tribe * † * Tribe Dioxyini * Aglaoapis * * Dioxys * Ensliniana * * * * * Tribe * Lithurgus * * * Tribe Megachilini * Coelioxys * Megachile * * Tribe Osmiini * * Ashmeadiella * * * Chelostoma * * Heriades * * Hoplitis * * * Ochreriades * Osmia * * Protosmia * * * Steno