100 



THE bbb-kkb;pbr's guide ; 



longed banquet, the wonderful transformation from the slug- 

 gish, worm-like larva, to the active, bird-like imago is accom- 

 plished. Sometimes the pupa is surrounded by a silken 

 cocoon, either thick, as the cocoon of some moths, or thin and 

 incomplete as the cocoon of bees. The cocoon is spun by mov- 

 ing the head back and forth. The liquid thread quickly dries, 

 and is drawn forth as the head moves. These cocoons are 



Fig. 39. 



Development of the l^ee, after Duncan. 



a b Eggs. ff Pupa. 



c d ef Larvae. k Caps. 



i Queen-cell. 



spun by the larvae as their last toil before assuming the restful 

 pupa state. The length of time in the pupa stage varies from 

 a few days to as many months. Sometimes insects which are 

 two-brooded remain as pupae but a few days in summer, while 

 in winter they are moths passing the quiescent period. Our 

 cabbage-butterfly illustrates this peculiarity. Others, like the 

 Hessian-fly and coddling-moth, remain through the long, cold 

 months as larvee. How wonderful is this 1 The first brood of 



