156 



The confused flour beetle (Tribolium confusum, Dav.) 

 is one of the most injurious insects to flour and prepared 

 cereal foods, with even a wider range of food than the 

 preceding insects of similar habits. 



The adult is a reddish- brown elongated beetle, about 

 T 2 F -ineh in length, and the larva a cylindrical grub about 

 J-inch long (Fig. 164). 



Fig. 164. Confused flour beetle. 



(a) beetle ; (b) larva ; (c) pupa ; (d) lateral lobe of pupa ; (e) head of 



beetle s/iotrhig antenna; (f) same of Tribolium ferrugineum ; 



all greatly enlarged. {From U. S. Dept. Agric.) 



The angoumois grain moth (Sitotroga cerealleUa, Oliv.) 



Fig. 165. Angoumois grain moth. 

 (a) egjs; (b) larva at work ; (c) larva, side vietv; (d) pupa ; {e) moth 

 (f) same, side view.) _ {From U. S. Dept. Agric.) 



