INSECTS INJURIOUS TO CEREALS 



241 



(Fig. 74) on the kernels of corn or other grain. The 

 eggs, which are elongated and regularly sculptured with 



Fig. 75. — Larva of Angoumois grain moth, enlarged. 



rectangular areas, soon turn to a pale reddish color. 

 They hatch in five or six days and the tiny white larva 

 (Fig. 75) burrows into the grain of corn, or wheat and 

 lives on the substance in the interior. 

 Like the grain-weevils, there may be 

 two or more individuals in a grain of 

 corn, but only one in a grain of wheat. 

 In three weeks or more the larva be- 

 comes full-grown, gnaws a circular 

 opening nearly through the skin of 

 the kernel for the escape of the moth, 

 and spins a cocoon about itself inside 

 the grain, where it pupates (Fig. 76). 

 The moth emerges a few days later. 



In the field there are at least four 

 broods in a season in the Southern 

 states, and in grain stored in a warm 

 room the insects breed throughout the FlG - 76. — Pupa of the 



rpn ,, „ Angoumois grain 



year, lney pass the winter out-ot- moth, enlarged, 

 doors as larvse in the kernels of grain. 



The moth infests barley, corn, wheat, and other cereals. 

 It is found in houses in popcorn, rice, and occasionally 

 in other cereals. 



