4 Farmers’ Bulletin 1156. 
Fic. 1.—Life cycle of the Angoumois grain moth in corn. The adult moth is shown 
at a and g. The larva is shown in different stages of its growth at b, c, d, and e. 
Notice that it begins feeding at the soft germ end of the seed and as it becomes larger 
eats out into the harder part of the corn. The larva transforms to the pupa as 
shown at f. From the pupa develops the adult moth g of the second generation. 
southward through all the Southern States and northward. The 
farther South it has spread the more destructive it has become, 
because it can multiply unhampered by long, cold winters. On the 
other hand, its spread northward has been limited by increasingly 
cold winter weather. 
While the moth causes much injury to the wheat crops in the 
southern parts of the Nerth Central States and New Jersey, Delaware, 
southeastern Pennsylvania, Maryland, and Virginia, crops grown 
still farther north are increasingly immune to attack in the field. 
After one passes the fortieth degree of north latitude injury from 
the Angoumois grain moth decreases rapidly. Because of the ease 
with which it can be carried in seeds the Angoumois grain moth is 
now and then reported from all States, even those possessing a climate 
far too cold to permit it to become a general pest. 
DESCRIPTION. 
The Angoumois grain moth passes through the usual insect stages— 
the parent insect or moth, the egg, the larva, and the pupa. The 
moth is shown in figures 1, 8, 11, and on title page. It varies some- 
what in color from buff to grayish or yellowish brown. In size it 
varies with the size of the grain in which it matures, but is never 
more than 0.6.to 0.7 of an inch from tip to tip of wings when these 
are spread as shown in figure 8. The average wing spread of the 
moth is about one-half inch. Whenever moths of this size, closely 
resembling ordinary clothes moths, are seen flying about grain it 
is reasonably certain that the grain is infested with the Angoumois 
grain moth. The eggs laid by the moth are about one-fortieth of an 
