WEEVILS 



365 



somewhat toward each end, three fourths of an inch long. Feeds on 

 the germ of grains. Adults and larvae 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 cre\dces should be 

 sprayed wi^h 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 



Fig. 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 



