38 



Several insects are parasitic on the fiill weli-worm. Figure 27 



Figure 27. 



MetcForus hyphantriw, RiLEY. 



shows one of these very much enlarged. Of this Dr. Riley, from 

 whom the figure is taken, says: " This parasite has performed very 

 good service during the caterpillar plague, and has done much to 

 check anv furthei increase of the weh-worm." Figure 28 gives 



Figure 28. 



Telenomus bijidiis, RlI-EY. 



another parasite described by Dr. Riley. It is a parasite of the 

 eggs of the web-worm, and the little insect passes all its stages in 



