CLASS INSECT A 301 



cover a span of five or six years, and the queens may survive for as many 

 as fifteen years. Among ants 27 different types of individuals have been 

 recognized, inchiding 7 types of males, an equal number of types of fertile 

 females, and 13 types of infertile females or workers. Not all of these 

 exist in the same society, but many of them may. Among the workers 

 are food gatherers, nurses, soldiers, and other types. This division of 

 labor is accompanied by great differences in size and structure, fitting 

 the different types of workers for the particular duties they have to 

 perform. 



