INSECTS INJURIOUS TO STORED GRAINS 



179 



injurious to seed-corn. It feeds mostly out of doors, though 

 sometimes infesting the granary. 



The Foreign Grain-beetle* is of much the same general ap- 

 pearance, but smaller and of a more robust appearance. It 

 feeds upon a great variety of stored products as well as grain, 

 but rarely becomes troublesome. 



The Cadellef also has the bad habit of first attacking the 

 embryo or germ of the kernel, and going from one kernel to another, 

 thus destroys a large number for seed purposes. It possesses, 

 however, the good trait of feeding on other injurious grain- 

 insects. The beetle is oblong, flat, nearly black, and about 

 one-third of an inch long. The larva is of a whitish color, with a 

 brown head, the thoracic segments are marked with brown, and 



FIG. 153. The Mediterranean flour-moth (Ephestia kuehniella): a, moth; 

 6, same from side, resting; c, larva; d, pupa enlarged ; e, abdominal 

 joint of larva more enlarged; /, larva, dorsal view. (After Chittenden, 

 U. S. Dept. Agr.) 



the abdomen terminates in two dark horny processes. It is a 

 fleshy grub, nearly three-fourths of an inch long when full grown. 



Flour- and Meal-moths 



The larvae of several small moths sometimes infest grain 

 in store, but rarely do it serious damage, preferring the softer 

 flour, meal and food-products. 



The most destructive of these is the Mediterranean Flour 

 moth} (Fig. 153). This insect was practically unknown until 



* Cathartus advena Waltl. 



t Tenebroides mauritanicus Linn. Family Trogositidce. 



j Ephestia kuehniella Zell. Family PyraUdidce. See W. G. Johnson, Ap- 

 pendix 19th Report State Entomologist of Illinois, and F. L. Washburn, 

 Special Report of the State Entomologist of Minnesota on the Mediter- 

 ranean flour-moth. 



