The son of Hyrieus. In Thebes he became the guardian of Labdacus and later of Laius. His brother Nycteus had instructed him upon his deathbed to take vengeance upon Epopeus, who had abducted his fair daughter Antiope. Lycus complied with his brother's wishes and returned Antiope, but gave her to his wife Dirce. He is one of the mythical kings of Thebes.
- Hyginus. Fabulae, 8.
- Pseudo-Apollodorus. The Library iii, 5.5.
- Smith, William. (1870). Dictionary of Greek and Roman Biography and Mythology. London: Taylor, Walton, and Maberly.