20 



INJURIOUS INSECTS 



snugly contain the beetle. The little spot where the 

 Pea-weevil entered can always be detected, even in the 

 dry pea, but in the bean these points of entrance become 

 almost entirely obliterated. The cell in which the trans- 

 formations take place is more perfect and smooth, and 

 the lining is easily distinguished from the meat of the 

 bean by its being more white and opaque. The excre- 

 ment is yellow, or darker than the meat, and, even 

 where a bean is so badly infested that the inside is en- 

 tirely reduced to this excrementitious powder, each 



Fig. 13.— THE BEAN-wEEVTL. iu wliitc-skinned varieties, so 



by the bluish-black spots which they exhibit (fig. 13, h). 

 Dark beans when infested are not so easily distinguished. 

 The germ is always found either untouched or only 

 partially devoured, even in the worst infested beans, so 

 that when but two or three weevils inhabit a bean, it 

 would doubtless grow; but where the meat is entirely 

 destroyed, as it often is, the bean would hardly grow 

 though the germ remained intact, and it would certainly 

 not produce a vigorous plant. Figure 13, a, gives the 

 weevil magnified, its real size being shown by the small 

 outline at the left. 



Some of the beetles are perfected in the fall, but many 

 of them not until the following sjDring, so that there is the 

 same danger of introducing them in seed-beans as in the 

 case of the Pea-weevil. The remedies and preventives 

 given for the Pea-weevil will of course apply equally well 



larva, before transforming, 

 manages to form for itself a 

 complete cell, which sepa- 

 rates it from the rest of its 

 bretliren. The eye-spot, as 

 in the pea, is perfectly cir- 

 cular and quite transparent 



{Bnu'lms fahce. ) 



a. Weevil, magnified, the real size in 

 outliue ; h, Infested Bean. 



that infested beans of this 

 kind are easily distinguished 



