METAMORPHOSIS 75 



and drones nearly a full fortnight in which to 

 complete their changes. 



As soon as the changes are complete and the 

 white grub has become a brown fluffy winged 

 insect, it gnaws a hole in the covering of its cell 

 and crawls into the open, taking its place among 

 the labourers to assist in rearing a new genera- 

 tion of babies. 



