EXPLANATION OF PLATE 



All the figures were photographed by means of a Zeiss A* objective, giving 

 a magnification of about 9 diameters. 



FiGTJBES 1-20. Heads of Caniponotus herculeanus pidiu?. 

 Figure 1 — Queen. 

 Figures 2-20 — Workers. 



Figures 21-23 — Heads of Pheidole pilifera. 

 Figure 21 — Queen. 

 Figure 22 — Soldier. 

 Figure 23 — Minor worker. 



For further description see text pp. 435 ff., 438 ff. 



