THE EUROPEAN HORSE-RADISH WEBWORM. ie 
broken white lines and the yellow spiracular stripes, but by degrees, after it 
settles down to feed aggin and grow, the black skin expands and the ground- 
colour of the back becomes more and more green until it is again of a blackish 
olivaceous-green, when the length ranges from 13 to 16 mm. 
Fic. 8.—Horse-radish leaf skeletonized by the European horse-radish webworm. 
It now consumes a great quantity of food and the plump skin begins to shine 
a little; at the end of about ten days it attains full-growth. 
