Lynceus (in Greek, Lynkeus) was the jealous murderer of Castor, along with his brother, Idas. Idas and Lynceus murdered Castor because they all (along with Polydeuces) sought Phoebe and Hilaeira, daughters of Leucippus (who was also Idas and Lynceus' uncle in some versions). Lynceus was one of the Argonauts and he participated in the hunt for the Calydonian Boar. He was a son of Aphareus and Arene and was said to have excellent sight, even able to see through trees, walls and underground.
- Bibliotheca I, viii, 2 and ix, 16; III, x, 3 and xi,2.
- Apollonius Rhodius, Argonautica I, 151-55;
- Ovid, Metamorphoses VIII, 304.
- Iamblichus, Invitation to Philosophy