M. superba, [491] f., [492], [493];

M. victoriae, [492], [493]

Menuridae, [491] f.;

habits, [493]

Mercerat–see Moreno

Merganetta, [112], [113];

M. armata, [116];

M. columbiana, [116];

M. frenata, [116];

M. garleppi, [116];