Diomedes, Latin grammarian, flourished at the end of the 4th century a.d. He was the author of an extant Ars grammatica in three books, dedicated to a certain Athanasius. The third book is the most important, as containing extracts from Suetonius’s De poëtis. Diomedes wrote about the same time as Charisius (q.v.) and used the same sources independently. The works of both grammarians are valuable, but whereas much of Charisius has been lost, the Ars of Diomedes has come down to us complete. In book i. he treats of the eight parts of speech; in ii. of the elementary ideas of grammar and of style; in iii. of quantity and metres.
The best edition is in H. Keil’s Grammatici Latini, i.; see also C. von Paucker, Kleinere Studien, i. (1883), on the Latinity of Diomedes.
