1911 Encyclopædia Britannica/Acro, Helenius
ACRO (or Acron), HELENIUS, Roman grammarian and commentator, probably flourished at the end of the 2nd century a.d. He wrote commentaries on Terence and perhaps Persius. A collection of scholia on Horace, originally anonymous in the earlier MSS., and on the whole not of great value, was wrongly attributed to him at a much later date, probably during the 15th century. It has been published by Pauly (1861) and Hauthal (1866), together with the other Horace scholia. See Pseudoacronis Scholia in Horatium Vetustiora, ed. O. Keller (1902–1904).