Plate XXXI If 



Acacia sphcerocephala : an Ant plant : showing "Belt's bodies" on tips of two leaflets 

 (to left), and glands at base of leaf stalk (to right) 



Acacia sphcerocephala: hollow thorns which are 

 penetrated by Ants 



I'.si udomyrma bicolor : an Antwhich 

 is associated with Acacia sphcero- 

 cephala (greatly magnified) 



