WASPS' NESTS. 



151 



bees, the nests of the social wasps consist principally 

 of combs formed of six-sided cells like those of a 

 honeycomb, from which, however, it differs in more 

 than one important respect. It consists of a single 



Nest of South American wasp. 



Nest of poHstes wasp. 



layer of cells instead of two ; these cells are usually 

 placed perpendicularly instead of horizontally, as are 



