CALLIAS, tyrant of Chalcis in Euboea, wished, with the assistance of Philip of Macedon, to subdue the whole island. But, finding Philip unwilling to help him, he applied to the Athenians, though he had previously fought against them. They were per suaded by Demosthenes to make an alliance with Callias, with whose help they drove out the pro-Macedonian tyrants from Eretria and Oreus, and at Demosthenes' suggestion handed over the tribute formerly paid by the Euboic cities to Athens to a Euboic synod sitting at Chalcis (Demosthenes, De Pace, 58; Ep. Philippi, S9; Diod. Sic. XVI. 74). At the end of his life he seems to have lived at Athens, and Demosthenes proposed to grant him the citizenship (Aeschines, Contra Ctesiph., 85, 87).