PLATE 2 



EXPLANATION OF FIGURES 



9 The disintegration of the included portion of a pupa just after pupation, 

 showing the nuclei undergoing fragmentation into globules. X 400. 



10 Cross-section of the urinary bladder of a pupa just after pupation, showing 

 the massed nuclei and the detritus of the muscles. X 220. 



11 Cross-section of the coelomic portion of a pupa three days old, showing 

 the disintegration of the basement membrane. X 400. 



12 Cross-section of the coelomic portion and the imaginal ring, which is form- 

 ing the imaginal common stem, of a pupa five days old. X 160. 



13 Cross-section of the coelomic portion of a pupa six days old. X 220. 



14 Cross-section of the coelomic portion of a pupa eight days old, showing 

 the formation of the imaginal striated border. X 220. 



15 Cross-section of the coelomic portion of an imago. X 400. 



210 



