VEGETABLE INSECTS. 



277 



BEAN i.EAF-MiXER {Afjromyza jucinda). 



The leaves of the henii are oeeasionallv mined by the grub of a 

 small Agromyzid tiy, but it is parasitized so heavily that it never 

 causes an appreciable amount of damage, and n-o control measures 

 are required. 



BEAN LEAF-ROLLER {ElldamUS pvoteus) . 



The larva of this swallow-tailed skipper, known as the bean leaf- 

 roller, is usually to be found feeding on the leaves of the bean. 



1 



Fig. 32. — Bean Leaf -Beetle (Cerotoma ruficornis). \, adult; 2, 

 pupa; 3, full-grown larva; 4, eggs. All much enlarged. 



Forming a characteristic shelter oy rolling up the edges of the leaf, 

 the larva hides within, coming out at times to feed on the foliage 

 immediately around it. 



The handsome green larva is readily distinguished from other 

 pests of the bean by the narrow constricted neck that joins the promi- 

 nent brown head to the velvety green body. 



The bluish-green adult known as a skipper butterfly may be 

 seen darting rapidly here and there among the bean plnnts, oceu- 



