A surname of Apollo describing him as the protector of the streets and public places. As such he was worshipped at Acharnae (Paus. i. 31. § 3), Mycenae (ii. 19. § 7), and at Tegea. (viii. 53. § 1.) The origin of the worship of Apollo Agyieus in the last of these places is related by Pausanias. (Compare Hor. Carm. iv. 6. 28; Macrob. Sat. i. 9.)