XXV 



INSECTA : HYMENOPTERA 



391 



In eact cell she lays an egg, fixing it near the base of 

 the cell, and then goes on to add fresh cells and fresh layers 



Fio. 302. — Nest of the Tree Wasp, early stage. 



In the lower diagram part of the wall has been removed to show the cells 

 within, and the many layers that form the papery covering. 



to the papery cap that hangs over them. Fig. 302, which is 

 really the small nest of a Tree Wasp, shows very well what an 

 early stage of the nest of the Common Wasp is like. 



