The Glow-Worm and Other Beetles 



that, until the nymph appears, there is no 

 empty space between one slough and the next. 

 The tertiary larva cannot budge. It is not 

 free, as witness its cast skin, which fits so 

 precisely to the envelope of the pseudochrys- 

 alis. This form would therefore pass un- 

 perceived if its existence were not proclaimed 

 by the membrane which lines the inside of 

 the pseudochrysalid pouch. 



To complete the story of the Zonites, the 

 primary larva is lacking. I do not yet know 

 it, for, when rearing the insect under wire- 

 gauze covers, I never succeeded in obtaining 

 a batch of eggs. 



184 



