Plate 1 (Opposite) 



Top: Dense prickly pear {Opuntia inermis) in belar {Casuarina) scrub prior to 

 insect attack, Chinchilla, Queensland, October 1926. Center: Same area 

 three years later (October 1929). The prickly pear has been destroyed by 

 Cadoblastis cactorum. Cochineal insects {Dactylopiiis opuntiae) can be seen on 

 two regrowth segments in left foreground. Bottom: The same area, reclaimed 

 from prickly pear and under pasture — a condition typical of the transformation 

 of 30,000,000 acres of land. 



