M. cupreus, [543];
M. nitidus, [544]
Monomachus, [563]
Monomorphic ant, [498]
Monotrochous trochanters, [494], [520], [564], [565]
Mordella eye, [98]
Mormolucoides articulatus, [449]
Morton, on gills of Trichoptera, [483];
on Perlidae, [406]
Moult, [156]