(Ἀρχάγαθος).
1. The son of Agathocles, accompanied his father in his expedition into Africa, B. C. 310. While there he narrowly escaped being put to death in a tumult of the soldiers, occasioned by his having murdered Lyciscus, who reproached hism with committing incest with his step-mother Alcia. When Agathocles was summoned from Africa by the state of affairs in Sicily, he left Archagathus behind in command of the army. He met at first with some success, but was afterwards defeated three times, and obliged to take refuge in Tunis. Agathocles returned to his assistance; but a mutiny of the soldiers soon compelled him to leave Africa again, and Archagathus and his brother were put to death by the troops in revenge, B. C. 307. (Diod. 20.33, 57_61; Just. 22.8.)