Μαντείας, (or rather Μαντίας), a physician, who was the tutor of Heracleides of Tarentum (Galen, De Compos. Medicam. sec. Gen. 2.15, vol. xiii. p. 462, 502), and one of the followers of Herophilus (Id. De Compos. Medicam. sec. Gen. 6.9, vol. xii. p. 989); and who lived therefore most probably in the third century B. C. ? Galen says he was no ordinary physician (De Compos. Medical. sec. Locos, 2.1, vol. xii. p. 534), and that he was the first who wrote a regular work on pharmacy (De Compos. Medicam. sec. Gen. 2.1, vol xiii. p. 462). His works on this subject, which are several times quoted by Galen, are lost, but the titles of some of them have been preserved. (De Simplic. Medicam. Temper. ac Facult. vi. praef. vol. xi. p. 795, Comment. in Hippocr. "De Offic. Med." praef. and 1.5, vol. xviii. pt. ii. pp. 629. 666, De Compos. Medicam. sec. Gen. 4.14, vol. xiii. p. 751.)