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 vines 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. 
Fic. 583.— The Bean Weevil. Fic. 584.— The Cowpea 
Adult, enlarged and natural Weevil. Enlarged and 
size. Original. 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- 
