The Collaborative International Dictionary of English v.0.48:

Oscinian \Os*cin"i*an\, n. (Zool.)
   Any one of numerous species of dipterous flies of the family
   Oscinidae.
   [1913 Webster]

   Note: Some, whose larvae live in the stalks, are very
         destructive to barley, wheat, and rye; others, as the
         barley fly (Oscinis frit), destroy the heads of
         grain.
         [1913 Webster]