204 



THE LIFE OF AN INSECT. 



the twig in the manner represented in the cut, 

 something like the feathers of an arrow in appear- 

 ance. And now, this 

 being done, the diffi- 

 culty was to draw the 

 two sides together, and 

 so to convert them into 

 a covering for its body. 

 The manner in which 

 this was done will 

 hardly, perhaps, be 

 imagined. It will be 

 best understood if the 

 reader will cut out two 

 pieces of paper of the 

 shape of these two side 

 portions, fasten them 

 on with a little glue by one of their edges to a 

 piece of twig, and then, by a fine needle and thread, 

 draw them together by stitching from side to side 

 all the way up. The larva does something very 

 like this, for it fixes silk cords to each of the outer 

 edges, and then pulls and hauls with all its might 

 until it has forcibly bent over the layers until they 

 meet, and then it ties the edges together by short 



Cases formed of Epidermis of Bark. 



