Diocles, probably identical with the demagogue Euricles, which is mentioned in Plut. Nic. 28, 1. After the triumph over the Athenians in 413bce, he was the most influential leader of the demos in Syracuse. Following his proposal, the Syracusan general assembly condemned to death the Athenian generals and the allies and sent the prisoners to the quarries (Diodorus 13.19.4 and 33.1). Later (412bce, Diodorus 13.34.6–35.1), he convinced the Syracusans to change their constitution, introducing the lottery for the appointment of magistrates and entrusting constitutional revision to a board of lawgivers elected by the people (Diocles was the most prominent among them). During the war against the Carthaginians, he was general, but he was unable to defend Himera and failed to give appropriate burial to the soldiers who had fallen in the fight (409bce). Probably responsible for the banishment of Hermocrates, he opposed his recall. Hermocrates tried to gain from his loss; because of his unpopular decision of refusing the burial of the dead in Himera, Diocles was exiled (408bce).