After the death of Eurystheus, Hyllus led the Heracleidae to attack Mycenae. Echemus offered himself as the champion of the defending Arcadian forces and killed Hyllus in single combat, thus forcing the Heracleidae to withdraw. This story is mentioned by the Tegeans as an example of their people's bravery in book 9 of The History by Herodotus.
- March, J., Cassell's Dictionary of Classical Mythology, London, 1999. ISBN 0-304-35161-XTemplate:Greek-myth-stub