3864 PESTS OF THE HOUSEHOLD AND STORED PRODUCTS 
Beetles and Weevils in Stored Products 
Stored grain and other stored products are subject to infestation 
by many species of small beetles. In most cases the greater part of the 
injury is due to the feeding of ‘‘ grubs,’’ which are the immature stages 
n 
on 
Fic. 580.—The Saw-Toothed 
Grain Beetle. Enlarged and 
natural size. Original. 
of the pest concerned, but since the 
grubs often work concealed, while the 
adults are active and visible, the latter 
are the stages commonly noted. Some 
of the species most likely to be observed 
are the following: 
‘The Granary Weevil (Calandra gra- 
naria Linn.), A brown snout-beetle, one 
seventh of an inchlong. Infests stored 
grains, especially wheat, corn, and bar- 
ley. The wings are not functional, and the insect cannot fly. 
The Rice Weevil (Calandra oryza Linn.). A dark brown snout-beetle 
with two obscure, slightly lighter markings on each wing cover. 
Attacks stored grains; also such 
manufactured products as crackers, 
flour, and the like. The adult can 
fly 
foods, and grains. 
The Confused Flour Beetle (Tri- Ci 
bolium confusum Duv.). A flat, brown 
beetle, one sixth of an inch long. 
A destructive pest of flour, cereal 
oe 
Fic. 581.—The Cadelle. En- 
The Rust-red Flour Beetle (Tri- Jarged and natural size. Orig- 
bolium navale Fab.). Closely resembles 
inal. 
the preceding species. The same feeding habits. 
The Saw-toothed Grain Beetle (Silvanus surinamensis Linn.). A 
slender, dark brown beetle, its thorax edged with short teeth. Found 
in all kinds of foodstuffs. 
The Cadelle (Tenebroides mauritanicus Linn.). A black, oblong beetle, 
one third of an inch in length. The larva whitish, fleshy, tapering 
