The Collaborative International Dictionary of English v.0.48:

Rurales \Ru*ra"les\ (r[.u]*r[=a]"l[=e]z), n. pl. [NL.] (Zool.)
   The gossamer-winged butterflies; a family of small
   butterflies, including the hairstreaks, violets, and theclas.
   [1913 Webster]