Seer and warrior, member of royal family of Argos, descended from Melampus. Son of Oecles, husband of Eriphyle, father of Alcmaeon (1) and Amphilochus. Unwilling participant in the expedition of the Seven against Thebes, whence he did not return. Consulted as an oracle and, from the later 5th centurybce, as a healer, on the model of Asclepius.Amphiaraus opposed the expedition against Thebes, knowing through his mantic foresight that it was doomed to failure. He was nonetheless forced to participate through the intervention of his wife, Eriphyle, who was also the sister of Adrastus (1). During an earlier quarrel between her husband and her brother, she had been empowered to decide disputes between them (Ap. Bib. 3.6.2; Diod. Sic. 4.65.6). Polynices, the Theban prince who was seeking Argive support for the attack against Thebes, knew of this arrangement and offered her a golden necklace in exchange for exercising her influence and forcing her husband to take part in the expedition (some variation on this is already alluded to at Od.