THE POLYBIA 
2 57 
On the left hand may be seen a nearly spherical nest, which 
is evidently hollow, and has cells both on the outside and within 
the cover. These cells are not placed vertically, with their 
mouths downward, like those of the wasp and hornet, nor 
l'OLYBIA. 
horizontally like those of the bee, but are set with their mouths 
radiating from the centre of the nest. Moreover, there is another 
curious circumstance connected with the nest. If it were to be 
opened., it would be seen to be composed of several concentric 
s 
