WEEVILS 365 
somewhat toward each end, three fourths of an inch long. Feeds on 
the germ of grains. Adults and larve also predaceous. 
For all of these pests the surest treatment is fumigation with carbon 
bisulphide or carbon tetrachloride. They may be killed, also, by heat- 
ing the material in which they are at work to a temperature of 125 to 
140 degrees for three or four hours. 
When foodstuffs in houses are infested, a thorough cleaning out of 
the storage places is necessary, together with proper treatment of the 
materials affected. In addition all cracks and crevices should be 
sprayed with gasoline, taking proper precautions to guard against 
fire. 
The Bean Weevil (Acanthoscelides (Bruchus) obtectus Say) 
Dried beans that have been gathered and stored for winter use are 
injured or destroyed by this insect. Many beans will be found showing 
Fic. 582. — Work of the Bean Weevil. Original. 
round holes where the adult weevils have emerged, others will have 
grubs still at work inside, and in the box or bin will be found numerous 
