Ἐρίγυιος, (Ἐριγύϊος), a Mytilenaean, son of Larichus, was an officer in Alexander's army. He had been driven into banishment by Philip because of his faithful attachment to Alexander, and returned when the latter came to the throne in B. C. 336. At the battle of Arbela, B. C. 331, he commanded the cavalry of the allies, as he did also when Alexander set out from Ecbatana in pursuit of Dareius, B. C. 330. In the same year Erigyius was entrusted with the command of one of the three divisions with which Alexander invaded Hyrcania, and he was, too, among the generals sent against Satibarzanes, whom he slew in battle with his own hand. [CARANUS, No. 3.] In 329, together with Craterus and Hephaestion, and by the assistance of Aristander the soothsayer, he endeavoured to dissuade Alexander from crossing the Jaxartes against the Scythians. In 328 he fell in battle against the Bactrian fugitives. (Arr. Anab. 3.6, 11, 20, 23, 28, 4.4; Diod. 17.57; Curt. 6.4.3, 7.3.2, 4. §§ 32-40, 7. §§ 6-29, 8.2.40.)