The Elegies (Greek: ἐλεγείων) are a body of short poems written some time in the sixth century BCE by Theognis of Megara, although some later poems are thought to have found their way into the collection. His authentic work is often seen as exemplary of the conservative values of the aristocratic symposia which emerged in response to the development of the Greek polis.
Free online texts
Perseus: The Elegiac Poems of Theognis, translated by J. M Edmonds. HTML and XML format.
Wikisource: Theognis of Megara, multiple external scans.
Perseus: ἐλεγείων. HTML and XML format.
Wikisource: Ελεγείαι Θεόγνιδος
Internet Archive: Elegy and Iambus, Vol I. Bilingual Loeb edition.
History of Ancient Greece: Poets and Wise Rulers, podcast by Ryan Stitt.
Internet Archive: Studies in Theognis, together with a text of the poems, by E. Harrison (1902).
Wikipedia: Theognis of Megara.
Further reading at Tom's Learning Notes
Plato: Meno - comments on Theognis.