144 



INSECTS INJURIOUS TO STAPLE CHOPS. 



the ears commence to form often penetrate the husk and 

 gorga out the soft cob. Sometimes the injury thus in- 

 flicted is but slight, merely resulting in a puncturing of 

 the leaves when they unfold, these being in a series across 

 the leaf resulting from a single puncture when the leaf was 

 folded, and looking much like the work of the Corn Eoot- 

 web-worm. But when several beetles attack a young plant, 



Fig. 79.— *Si. ochreus, larva, adult, and work in roots of Srirpus. 

 (After Webster, "Insect Life.") 



they will either kill it outright or so deform the foliage 

 and stalk that no ear will mature. 



Several other species have also been known to do more 

 or less injury to corn, viz., ;S'. sropan'iis, ])Iacidus, cariosus, 

 S('(il/)filis^ and pertinax, but so far as known their habits 

 and injuries are much the same as of those already described. 



