I. The hundred-eyed keeper of Io, after she was changed into a heifer by Jupiter; slain by Mercury at the bidding of Jupiter. His hundred eyes were placed by Juno in the tail of the peacock, Ov. M. 1, 625 sq.; 15, 385; Prop. 1, 3, 20 (cf. Eustath. ad Hom. Il. 2, p. 138; Schol. ad Eurip. Phoen. v. 1123; Heyne, Apollod. p. 249 sq.).—
II. The builder of the ship Argo, Val. Fl. 1, 93 and 314.—
III. Argus , a, um, adj., = Argivus; v. Argos, II. D.