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 -inch in length, and the larva a cylindrical grub about 

 i-inch long (Fig. 164). 



Fig. 164. Confused flour beetle. 



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



beetle showing antenna ; (/) same of Tribolium ferrugineum 



ail greatly enlarged. (From U. S. Dept. Agric.) 



The angoumois grain moth (Sitotroga cereallella, Oliv.) 



Fig. 165. Angoumois grain moth. 



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

 (/) same, side view.) (From U. S. Dept. Agric.) 



