Andrew Lang,
Myth, Ritual And Religion, Vol…
“ This leaves him free to imagine a philosophic explanation of the myth based on the word Metis.**** We may agree with Müller that the "swallow-myth" is extremely archaic in character, as it is so common among the backward races. As to the precise amount, however, of philosophic reflection and allegory which was present to the cosmogonic poet's mind when he used Metis as the name of the being who could become a fly, and so be swallowed by her husband, it is impossible to speak with confidence. ”
