SOCIAL HOMES 



185 



more or less concave, so that the edges of the sphere 

 project and afford a certain amount of protection to 

 the middle portion. The cellular canopy is a spongy 

 substance, not unlike a lather of soap; in reality it 



FIG. 32. Wasp's Nest (Chartergns apicalis), interior and exterior. 



is a species of paper, and when torn or cut offers 

 some resemblance to cotton-wool. It is usually of a 

 yellowish or tawny* colour, and somewhat gummy 

 and glossy. This paper is kneaded and worked up 

 by the manufacturers until it becomes uniform, and 



