Amphiaraus, the semi-divine soothsayer of legendary Greece, was the son of Oideus (or perhaps of Phoebus) and Hypermnestra. He contended with Adrastus for the throne of Argus, but came to terms with him and married his sister Eriphyle. He took part in the chase of the Calydonian boar, and in the Argonautic Expedition, but tried to shirk the war of the Seven against Thebes, knowing it would be fatal to him. Eriphyle betrayed him, so he went to his doom, enjoining his son Alcmaeon to avenge him. After his death he received divine honours at Oropios in Attica.