366 PESTS OF THE HOUSEHOLD AND STORED PRODUCTS 



small, mottled, brownish beetles, about one eighth of an inch long, 

 their wing covers a little shorter than their bodies. 



Infestation may have been carried over from old beans left in the box 

 from last season's crop, for the insect continues to breed through the 

 year in stored beans. Or the eggs may have been laid in the beans 

 while still on the ^dnes in the field, the beetles being abroad on the wing 

 in late summer. 



Fumigation with carbon bisulphide or carbon tetrachloride is the 

 best treatment, and should be applied as soon as beans are gathered. 

 Infested beans should not be planted for seed. 



Fig. 583. — The Bean Weevil. 

 Adult, enlarged and natural 

 size. Original. 



Fig. 584. — The Cowpea 

 Weevil. Enlarged and 

 natural size. Original. 



The Cowpea Weevil {Pachymerus (Bruchus) chinensis L.) 



Stored beans, peas, and cowpeas are attacked by this weevil. In 

 most particulars its life round is the same as that of the bean weevil. 

 It continues to breed in the stored seed. 



Treatment consists in fumigation with carbon bisulphide or carbon 

 tetrachloride. 



The Four-spotted Bean Weevil (Pachymerus (Bruchus) quadrimacu- 



latus Fab.) 



Still another weevil working in dried beans and peas is the four- 

 spotted bean weevil. While the adult differs somewhat from the pre- 



