DEMETRIUS, a Cynic philosopher, born at Sunium, who lived at Corinth and in Rome during the reigns of Caligula, Nero and Vespasian. He was an intimate friend of Thrasea Paetus and Seneca. He was equally impervious to the bribes of Caligula and the anger of Vespasian who banished him. He reached the logical conclusion of Cynicism in attaching ncr real importance to sci entific data.