(Ὀξύθεμις), a friend of Demetrius Poliorcetes, who was sent by him to the court of Agathocles, king of Sicily, with whom he had just concluded an alliance, ostensibly in order to receive the ratification of the treaty, but with a secret mission to examine the real state of affairs in Sicily. The death of Agathocles followed shortly after,B. C. 289, and it was Oxythemis who placed him on the funeral pile, as we are told, before life was yet extinct. (Diod. xxi. Exc. Hoesch. pp. 491, 492.)