54 EMPEROR 5IOTIJ. 



double, a loose outer envelope enclosing an inner 

 cocoon made of stiffer hairs. The ends of these 

 hairs converge over the opening, so that the Moth, 

 when it shakes off the pupal skin, can easily creep 

 out, while no other insect can creep in. Th<a 



Emperor Moth Cocoon. 



structure of the cocoon is shown in the accom- 

 panying illustration. The larva of the Emperor 

 Moth may generally be found upon the heath. 

 The form of the antennae is shown in cut G, 

 fig. 3, page 21. 



