a celebrated grammarian of the Augustan age. He was the son of a seller of fish at Alexandria, and was born about B.C. 64. He was a disciple of Aristarchus, and in his literary labours he followed strictly the critical principles of his master. Athenæus computes the works of Didymus at 3500, and Seneca at 4000. The names of γαλαξιτης (brazen-bowelled), and βιβλολογικός (forgetter of his own books), by which he was distinguished amongst his contemporaries, sufficiently indicate his perseverance, and the voluminous character of his writings. His principal works seem to have been his scholia on Homer, Aristophanes, Pindar, Sophocles, Euripides, and several of the Greek orators. It is probable that many of the comments of the later scholiasts were borrowed from him. He is said also to have written against Cicero's Republic. The collection of Greek proverbs, and the fragments of the books on agriculture, which bear his name, are at least only in part genuine.

of Alexandria, an ecclesiastical writer who flourished in the fourth century. Notwithstanding his blindness, which took place before he had learned to read, he succeeded in mastering the whole circle of the sciences then known; and on entering the service of the church he was placed at the head of the Alexandrian theological school. Most of his theological works are lost. We possess however a Latin translation by Jerome of his Treatise on the Holy Ghost, and a similar translation by Epiphanius of his Brief Comments on the Canonical Epistles. A Treatise against the Manicheans is extant in the original Greek, and was first published at Bologna in 1796.