The Moths and Butterflies 391 



through holes in the cane thoughtfully made by the strong-jawed larvae 

 before pupation. The grape-vine-root borer, Memythrus polistiformis, looks 

 much like a large Polistes wasp, having a dark body with two bright yellow 



FIG. 556. Larva of peach-tree borer, Sanninoidea exitiosa. 



size and much enlarged.) 



(After Slingerland ; natural 



narrow bands about the abdomen; the fore wings are brownish black, the 

 hind wings clear; the larvae bore in the roots of wild and cultivated grapes 

 and pupate underground. The raspberry-root borer, Bembecia marginata, 

 is also very waspish in appearance, with its black body repeatedly banded 



FiG. 557. Cocoons and empty pupal skins of the peach-tree borer, Sanninoidea exitiosa. 

 (After Slingerland; natural size.) 



with yellow and transparent fore and hind wings. The eggs are laid on 

 raspberry canes, and the larvae, first boring into the cane, finally work down 

 into the roots. Squashes are often badly injured by having their stems 

 tunneled by the larvae of the squash-vine borer, Melittia ceto, a Sesian with 

 olive-brown fore wings, clear hind wings, and black or bronze abdomen, 



