The son of Ares and Philonome, daughter of Nyctimus and Arcadia. For fear of her father she cast Lycastus and his twin brother Parrhasius into the river Erymanthus. The river god carried them into a hollow oak tree, where they were suckled by a she-wolf. The shepherd was witness of this event and took up the children and raised them as his own.
- Plutarch. Parallela Minora, 36.
- Smith, William. (1870). Dictionary of Greek and Roman Biography and Mythology. London: Taylor, Walton, and Maberly.