Fig. i. 



Form. San- 

 guinea Ltr., 

 subsp. rubi- 

 cunda Em. 

 Normal dea- 

 lated queen 

 from Prairie 

 du Chien, 

 Wisconsin, 

 U. S. A. 



Fig. 2. 



Form, san- 

 guinea Ltr., 

 subsp. rubi- 

 cunda Em. 

 Normal wor- 

 ker, from the 

 same nest. 



Fig. 3- 



Formica san- 

 guinea, Ltr., 

 subsp. mbicun- 

 daEm. Pseudo- 

 gyne from the 

 same nest. 



Fig. 4. 



Xenodiisa cava 

 Lee., whose lar- 

 val education 

 caused the rea- 

 ring of Pseudo- 

 gynes in the 

 same colony of 

 ants. 



(All figures magnified to seven times their natural size.) 



