4. The wife of Magas, king of Cyrene. In order to put an end to his disputes with his
brother Ptolemy II. Philadelphus, Magas had betrothed his only daughter, Berenice, to the son
of Ptolemy, but died before the marriage took place. As Arsinoe disapproved of this connexion,
she invited Demetrius the Fair, the son of Demetrius Poliorcetes, to Cyrene, in order to
become the king of the place and the husband of Berenice. But his beauty captivated Arsinoe;
and her daughter indignant at the treatment she had received, excited a conspiracy against
him, and caused him to be killed in the arms of her mother. Berenice then married the son of
Ptolemy. (Justin, Kleine Seriften, p. 230) conjectures that she was
the same as the daughter of Lysimachus [No. 3], who after her banishment to Coptos went to
Cyrene, and married Magas.