Definitions of the Morally Intermediate, addressed to Metrodorus, two books. Definitions of the Generic Notions [in Ethics], addressed to Metrodorus, seven books. Definitions concerned with other Branches of Science, addressed to Metrodorus, two books. Second series : Of Similes, addressed to Aristocles, three books. Of Definitions, addressed to Metrodorus, seven books. Third series : Of the Objections wrongly urged against the Definitions, addressed to Laodamas, seven books. Probabilities in Support of the Definitions, addressed to Dioscurides, two books. Of Species and Genera, addressed to Gorgippides, two books. Of Classifications, one book. Of Contraries, addressed to Dionysius, two books. Probable Arguments relative to the Classifications, Genera and Species, and the Treatment of Contraries, one book. Fourth series : Of Etymological Matters, addressed to Diocles, seven books. Points of Etymology, addressed to Diocles, four books. Fifth series : Of Proverbs, addressed to Zenodotus, two books. Of Poems, addressed to Philomathes, one book. On the Right Way of reading Poetry, two books. A Reply to Critics, addressed to Diodorus. one book.