Same entry in Photius; more briefly in Hesychius, who calls the dance 'Macedonian'.
[1] The passage in question is Xenophon, Anabasis 6.1.7: "after this some men from Ainos and Magnesia [in Thessaly] stood up and danced, in armour, the so-called karpaia". It was thought noteworthy enough to be quoted by Athenaeus, Deipnosophists 1.15F-16A [1.27 Kaibel], together with the elucidation which follows (6.1.8-9): "the manner of the dance was that one man lays down his arms and starts to sow and plough with oxen, often turning round as if afraid, and a raider appears; when the first man sees him he snatches up his arms, goes to meet him, and fights for the ox-team. They would do this in time to the pipe; and at last the raider ties up the man and carries off the team -- though sometimes it is the ploughman who does this to the raider, whereupon he hitches him to the oxen and drives him off with both hands tied behind his back". See web address 1.