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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]