Ambrosias Anrelius Theodosius Macrobius, known as the grammarian, a Latin author of the 5th century. Little is known of his life, but the frequent Hellenisms in his writings indicate that he was a Greek; and though he mentions the massacre of the innocents by Herod, he appears to have been a heathen, following the Neo-Platonist philosophy of his time. Three of his works are extant: Satur-naliorum, Conviviorum Libri VII., a series of dissertations, in the manner of the dialogues of Plato, discussing the attributes and festivals of Saturn and Janus and the Roman calendar, commenting on the works of Virgil, and treating various other subjects; Commentarius ex Cicerone in Somnium Scipionis, a work greatly admired during the middle ages, which discourses of the constitution of the universe according to the views of the Neo-Platonists; and De Differentiis et Societatibus Grceci La-tinique Verbi, a grammatical treatise, abridged in the time of Charles the Bald from the original work, which is now lost. The best edition of his works is that of Gronovius (Leyden, 1670), but it does not contain the De Differentiis, which was published in Paris in 1533. His works have been twice translated into French (Paris, 1826, and 3 vols., 1845-7), but not into English.