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lie commanded an army. In order to please the king, he caused all the senators of his native place to be massacred. He afterwards accompanied Mithridates to Pontus, and, after the fall of the king, Diodorus received the punishment for his cruelty. Charges were brought against him at Adramyttium, and as he felt that he could not clear himself, he starved himself to death in despair. (Strab. xiii. p. 614.)
2. Of alexandria, surnamed Valerius Pollio, was a son of Pollio and a disciple of Telecles. He wrote, according to Suidas (s. v. ricoAtcyv) and Eu-docia (p. 136), a work entitled Qruycris tuiv (^ToUjUej/wy Trapa tols i p^ropcnz/, and another 'atti/ct) Ae£ts. He lived in the time of the emperor Hadrian, and is perhaps the same as the Theodorus who is mentioned by Athenaeus (xiv. p. 646, comp. xv. pp. 677, 678^ 691; Phot. Bibl. Cod. 149) as the author of 'Arrt/cai TAcScrcrai.
3. Of antioch, an ecclesiastical writer who lived during the latter part of the fourth century after Christ, and belonged to a noble family. During the time that he was a presbyter and archi-mandrita at Antioch, he exerted himself much in introducing a better discipline among the monks, and also wrote several works, which shewed that he was a man of extensive acquirements. When Meletius, the bishop of Antioch, was sent into exile in the reign of the emperor Valens, Diodorus too had to suffer for a time; but he continued to exert himself in what he thought the good cause, and frequently preached to his flock in the open fields in the neighbourhood of Antioch. In A. d. 378 Meletius was allowed to return to his see, and one of his first acts was to make Diodorus bishop of Tarsus. In A. d. 381 Diodorus attended the council of Constantinople, at which the general superintendence of the Eastern churches was entrusted to him and Pelagius of Laodiceia. (Socrat. v. 8.) How long he held his bishopric, and in what year he died, are questions which cannot be answered with certainty, though his death appears to have occurred previous to a. d. 394, in which year his successor, Phalereus, was present at a council at Constantinople. Diodorus was a man of great learning (Facund. iv. 2) ; but some of his writings were not considered quite orthodox, and are said to have favoured the views which were afterwards promulgated by his disciple, Nestorius. His style is praised by Photius (Bibl. Cod. 223, where he is called Theodorus) for its purity and simplicity. Respecting his life, see Tillemont, Hist, des Emp. viii. p. 558, &c., and p. 802, &c., ed. Paris.
Diodorus was the author of a numerous series of works, all of which are now lost, at least in their original language, for many are said to be still extant in Syriac versions. The following deserve to be noticed: 1. Kara e^ua^uei'Tjs, in 8 books or 53 chapters, was written against the theories of the astrologers, heretics, Bardesanes, and others. The whole work is said to be still extant in Syriac, and considerable Excerpta from it are preserved in Photius. (/. c.) 2. A work against Photinus, Malchion, Sabellius, Marcelms, and Ancyranus. (Theodoret. de Haeret. Fab. ii. in fin.) 3. A work against the Pagans and their idols (Facund. iv. 2), which is perhaps the same as the Kara TlXarcwos TrejOi 3-eov teal &ewv. (Hieronym. Catal. 119.) 4. XpoviKov §iopQovp.svov to (T^aA^a EvaeSiov rov TIa/i<2>iAoi; Trept t&v xpovwv., that is, on chronolo-
gical errors committed by Eusebius. (Suid. s. v Aiofiwpos.) 5. Hepl rov els ©eos ev Tptao\ was directed against the Arians or Eunomians, and is said to be still extant in Syriac. 6. Tlpos Tparia-vbv /ce^aAcua. (Facund. iv. 2.) 7. Hepi ttjs ttt-irdpxov (rtyaipas. This Hipparchus is the Bithy-nian of whom Pliny (H. N. ii. 26) speaks. 8. Tiepl irpovoias, or on Providence, is said to exist still in Syriac. 9. Tipds Etxppoviov <pi\6(ro(pov9 in the form of a dialogue. (Basil. Epist. 167; Facund. iv. 2.) 10. Karct, Maw%afcwv, in 24 books, of which some account is given by Photius. (Bibl. Cod. 85 ; comp. Theodoret. i. in fin.) The work is believed to be extant in Syriac. 11. Hepl rov dyiov Trz/eifytaros. (Phot. Bibl. Cod. 102 ; Leontius, de SectiSy pp. 448.) 12. Tlpos rovs ^vvovaiaffrds, a work directed against the Apollinaristae. Some fragments of the first book are preserved in Leontius. (Bibl. Pair. ix. p. 704, ed. Lugdun.) This work, which is still extant in Syriac, seems to have been the principal cause of Diodorus being looked upon as heretical ; for the Nestorians appealed to it in support of their tenets, and Cy-rillus wrote against it. 13. A commentary on most of the books of the Old and New Testament. This was one of his principal works, and in his interpretation of the Scriptures he rejected the allegorical explanation, and adhered to the literal meaning of the text. (Suidas, I. c.; Socrat. vi. 2 ; Sozomen. viii. 2; Hieronym. Catal. 119.) The work is frequently referred to by ecclesiastical writers, and many fragments of it have thus been preserved. (Cave, Hist. Lit. i. p. 217, ed. London ; Fabric. Bibl. Gr. iv. p. 380, ix. p. 277, &c.)
4. Of ascalon, a Greek grammarian, who wrote a work on the poet Antiphanes. (Tiepl ' tydvovs teal rr\s irapci rots vevrepois Athen. xiv. p. 662.)
5. Of aspendus, a Pythagorean philosopher, who probably lived after the time of Plato, and must have been still alive in 01. 104, for he was an acquaintance of Stratonicus, the musician, who lived at the court of Ptolemy Lagi. Diodorus is said to have adopted the Cynic mode of living. (lamblich. Vit. Pytliag. 36 ; Athen. iv. p. 163; Bentley, Phalar. p. 62, ed. London, 1777.)
6. Surnamed cronus, a son of Ameinias of lasus in Caria, lived at the court of Alexandria in the reign of Ptolemy Soter, who is said to have given him the surname of Cronus on account of his inability to solve at once some dialectic problem proposed by Stilpo, when the two philosophers were dining with the king. Diodorus is said to have taken that disgrace so much to heart, that after his return from the repast, and writing a treatise on the problem, he died in despair. (Diog. Lae'rt. ii. 111.) According to an account in Strabo (xiv. p. 658, xvii. p. 838), Diodorus himself adopted the surname of Cronus from his teacher, Apollonius Cronus. Further particulars respecting his life are not known. He belonged to the Megaric school of philosophy, and was the fourth in the succession of the heads'of that school. He was particularly celebrated for his great dialectic skill, for which he is called d StaAe/m/cos, or fiiaXetcriKwraros. (Strab. I. c.; Sext. Empir. adv. Gram. i. p. 310; Plin. H. N. vii. 54.) This epithet afterwards assumed the character of a surname, and descended even to his five daughters, who were likewise distinguished as dialecticians. Respecting