Lewis & Short

instĭta, ae, f. [insisto].

  1. I. The border or flounce (laid in several plaits) of a Roman lady’s tunic (poet. and in post-Aug. prose): quarum subsutā talos tegit instita veste, Hor. S. 1, 2, 29: longa, Ov. Am. 1, 32: nulla, i. e. no lady, id. ib. 2, 600.
  2. II. A bandage, girth, Petr. 20; id. 97, 4; Scrib. Larg. 133; Stat. Th. 7, 654.