The Collaborative International Dictionary of English v.0.48:

Tortrix \Tor"trix\, n. [NL., fr. L. torquere, tortum, to twist.]
   1. (Zool.) Any one of numerous species of small moths of the
      family Tortricidae, the larvae of which usually roll up
      the leaves of plants on which they live; -- also called
      leaf roller.
      [1913 Webster]

   2. (Zool.) A genus of tropical short-tailed snakes, which are
      not venomous. One species (Tortrix scytalae) is
      handsomely banded with black, and is sometimes worn alive
      by the natives of Brazil for a necklace.
      [1913 Webster]