a citizen of Tegea in Arcadia. He with two brothers fought against the three sons of Demonitratus of Pheuneus, to put an end to a long war between their respective nations. The brothers of Critolaus were both killed, and he alone remained to withstand his three bold antagonists. He conquered them; and when at his return his sister deplored the death of one of his antagonists, to whom she was betrothed, he killed her in a fit of resentment. The offence deserved capital punishment; but he was pardoned on account of the services he had rendered his country. He was afterwards general of the Acheans; and it is said that he poisoned himself because he had been conquered at Thermopylae by the Romans, about 146 years before the Augustan age.