Megachile lagopoda (see Hare-footed Leaf-cutter).
Megachile sericans (see Silky Leaf-cutter).
Melitta (see Colletes).
Miall, Bernard.
Midwife Toad.
Morawitz' Osmia.
Odynerus (see also the varieties below)
Odynerus alpestris (see Alpine Odynerus).
Odynerus delphinalis.
Odynerus rubicola.