Note 493 — MENSIS MAIUS.
Reading edition
Mommsen, l. c. Henzen, Acta Fr. Arv. xlvi-xlviii; Jordan on Preller, i. 420, and Topogr. i. 289, ii. 236. The latter would also identify Ambarvalia and Amburbium; but the two seem clearly distinguished by Servius (Ecl. 3.77).