Lewis & Short

Byrsa, ae, f., = Βύρσα, the citadel of Carthage, Verg. A. 1, 367; Liv. 34, 62, 12.
Hence, adj.: Byrsĭcus, a, um, Byrsic, i.e. Carthaginian, Sid. Ep. 7, 17, 18.