The Collaborative International Dictionary of English v.0.48:

Angoumois moth \An`gou`mois" moth"\ (?; 115). [So named from
   Angoumois in France.] (Zool.)
   A small moth (Gelechia cerealella) which is very
   destructive to wheat and other grain. The larva eats out the
   interior of the grain, leaving only the shell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

angoumois moth
    n 1: small moth whose larvae feed on kernels of stored grains
         [syn: angoumois moth, angoumois grain moth, Sitotroga
         cerealella]