Lewis & Short

Scytha, ae, m., and Scythes, ae, m., = Σκύθης, a Scythian; sing. form Scytha, Phaedr. 3, prol. 52; Luc. 10, 454; Vulg. Col. 3, 11; cf. Lact. 3, 25, 18; Tac. A. 2, 60; form Scythes (class.), Cic. Tusc. 5, 32, 90; Hor. C. 2, 11, 1; 4, 14, 42; Plin. 7, 56, 57, § 198; cf. Hor. C. 4, 5, 25; Sen. Hippol. 167.
Mostly in plur.: Scythae, ārum, m., = Σκύθαι.

  1. I. The Scythians, a general designation of the nomadic tribes of the north of Europe and Asia, beyond the Black Sea, Mel. 2, 1, 2; 1, 2, 3 sq.; 3, 7, 1; Plin. 4, 12, 25, § 81; 6, 17, 19, § 50; Cic. Verr. 2, 5, 58, § 150; Hor. C. 1, 35, 9; 3, 8, 23; 3, 24, 9; id. C. S. 55 et saep.
    Hence,
  2. II. Scythes or Scytha, ae, adj. comm., Scythian: Taurus, Sen. Hippol. 906: Pontus, Stat. Th. 11, 437; Sen. Herc. Fur. 1210: pellis, Mart. 10, 62, 8: smaragdos, id. 4, 28, 4.
    1. B. Scy-thĭa, ae, f., the country of the Scythians, Scythia, Mel. 1, 3, 4; 2, 1, 6; 3, 5, 6; Plin. 2, 50, 51, § 135; 4, 13, 27, § 941; Just. 2, 2; Cic. Pis. 8, 18; id. N. D. 2, 34, 88; Ov. M. 1, 64; 2, 224; id. Tr. 1, 3, 61; 3, 2, 1 et saep.
    2. C. Scythĭcus, a, um, adj., Scythian: Oceanus, Mel. 1, 2, 1; Plin. 2, 17, 20, § 53: Ister, Ov.Tr.5, 1, 21: amnis, i. e. the Tanais, Hor. C. 3, 4, 36: orae, Ov. Tr. 4, 9, 17; id. M. 5, 649: montes, id. ib. 15, 285: sagitta, id. ib. 10, 588: tegimen, Cic. Tusc. 5, 32, 90: Diana, i. e. the Taurian Diana, Ov. M. 14, 331 et saep.
      In partic.: herba, Plin. 27, 1, 1, § 2; more usually called Scythĭcē, ēs, f., id. 25, 8, 43, § 82; 26, 14, 87, § 146.
    3. D. Scythis, ĭdis, f.
      1. 1. A Scythian woman, Ov. M. 15, 360; Val. Fl. 5, 343.
      2. 2. The Scythian emerald, Mart. Cap. 1, §§ 67 and 75.
    4. E. Scythissa, ae, f., a Scythian woman, Nep. Dat. 1, 3.