are described by Menander, (Excerpt. Legation p. 149,) Procopius, (de Bell. Persic. l. i. c. 17, 19, l. ii. c. 10,) and, in the most lively colors, by Ammianus Marcellinus, (l. xiv. c. 4,) who had spoken of them as early as the reign of Marcus.
