o vastator

from The Collaborative International Dictionary of English v.0.48

Fritfly \Frit"fly`\, n. (Zool.)
   A small dipterous fly of the genus {Oscinis}, esp. {O.
   vastator}, injurious to grain in Europe, and {O. Trifole},
   injurious to clover in America.
   [Webster 1913 Suppl.]