12 COMPLETE INSTRUCTION IN 



skin is seen to be separate from the new, which 

 has formed all over the body during their molt. 

 Between the old and the new skin there is a 



Beginning of Fourth Age. 



watery fluid, provided so that the worms can 

 more easily slide out of the old covering. This 

 action is still further aided by the little horn that 

 is always seen on the back, near the tail of the 

 worm. 



When the worms have ceased to eat before each 

 molt, they fasten themselves to the place where 



End of Fourth Age. 



they are resting. This fasten^ the old skin so 

 that it is held on the spot while the worm crawls 

 out of its old house into a seemingly new life. 



Skin of Worm. 



Head-covering. 



By lifting the old skin up, the entire outline of 

 the worms may be traced, as the skin is stretched 

 out while yet moist. 



