CEREAL PESTS INSECTS 



495 



red flour beetle ( Tribolium ferrugineum, Fab.) resembles 

 the confused flour beetle in color, form, and size, but the 

 head is not expanded beyond the eyes at the sides, and 

 the antennge terminate in a distinct 3-jointed club. It 

 occurs in grain, meal, and flour, but is somewhat re- 

 stricted to the southern states. The small-eyed flour 

 beetle (Palorus ratzeburgi, Wissm.) was first found in 



FIG. 155. The Angoumois grain moth: a, eggs ; 6, infested wheat ker- 

 nels ; c, larva ; d, pupa ; e, mature moth ; / , adult with wings closed. 



this country in 1882 in a flour mill near Detroit, Michi- 

 gan, and is one of the smallest of our flour beetles known 

 to injure cereals. It shows a preference for ground prod- 

 ucts. The broad-horned flour beetle (Echocerus cornutus, 

 Fab.) is injurious in about the same way as the small- 

 eyed flour beetle, but not widely distributed, and is rarely 

 found doing serious injury in this country. The latter, 

 however, is a bakery pest in places in Europe. 



