From 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]
From 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]