Weevils in Beans and Peas. 19 
emergence holes and injury caused by this weevil are illustrated in 
Figure 18. 
THE MEXICAN BEAN WEEVIL."* 
The Mexican bean weevil is an inhabitant of South and Central 
America and is frequently found at our Pacific and Atlantic ports, 
infesting beans imported from these countries. It 
attacks beans and cowpeas. It breeds continu- 
ously in dried seeds and is capable of being as in- 
jurious as the common bean weevil, as indicated 
by the five small beans affected by this pest, 
shown at the bottom of Figure 1. For the size, 
shape, and coloration of this insect, see Figure 
19. The adult lays her eggs upon the seeds, to i 
which they are stuck by a cement similar to a aaa 
that used by the cowpea weevil (Fig. 15.) While Greatly enlarged. 
occasionally intercepted at ports of entry for — (Chittenden. 
many years past, this species does not appear to have become estab- 
lished in the United States. 
THE BROAD-BEAN WEEVIL. 
The broad-bean weevil closely resembles the common pea weevil, 
being about the same size, one-fifth of an inch long, and of similar 
Fie. 21.—A broad. horse. or Windsor bean, grown in California, cut open to show the 
damage caused by grubs of the broad-bean weevil. Only one generation of this weevil 
occurs each year. As each cavity represents the feeding of one grub, this bean is badly 
affected. Considerably enlarged. 
appearance. It can, however, be readily distingwshed by its much 
narrower thorax and fainter markings, as a comparison of Figures 
20 and 10 will show. 
14 Spermophagus pectoralis Say. 1% Bruchus rufimanus Boheman. 
