This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Myrmecoleon (Medieval bestiaries)
The Myrmecoleon, or Ant-lion, is a tale of two creatures and many translation errors. Druce distinguishes between the Eastern myrmecoleon, a hybrid of lion and ant, and the Western myrmecoleon, a carnivorous insect. These are one and the same, but the vagaries of translation led them down separate paths.
It is a beast that is the result of a mating between a lion and an ant. It has the face of a lion and and the body of an ant, with each part having its appropriate nature. Because the lion part will only eat meat and the ant part can only digest grain, the ant-lion starves.