E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Ache’mon,
or Achmon, and his brother Baslas were two Cercps for ever quarrelling. One day they saw Hercules asleep under a tree and insulted him, but Hercules tied them by their feet to his club and walked off with them, heads downwards, like a brace of hares. Everyone laughed at the sight, and it became a proverbial cry among the Greeks, when two men were seen quarrelling—“Look out for Melampy’gos!” (i.e. Hercules).
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“Ne insidas in Melampygum.”
According to Greek fable, monkeys are degraded men. The Cercps were changed into monkeys for attempting to deceive Zeus.
las were two Cerc
p
s for ever quarrelling. One day they saw Hercules asleep under a tree and insulted him, but Hercules tied them by their feet to his club and walked off with them, heads downwards, like a brace of hares. Everyone laughed at the sight, and it became a proverbial cry among the Greeks, when two men were seen quarrelling—“Look out for Melampy’gos!” (i.e. Hercules).
According to Greek fable, monkeys 
