(Ἀγασίας), a Stymphalian of Arcadia (Xen. Anab. 4.1.27), is frequently mentioned by Xenophon as a brave and active officer in the army of the Ten Thousand. (Anab. 4.7.11. 5.2.15, &c.) He was wounded while fighting against Asidates. (Anab. 8.8.19.)