Plate 6 



Harrisia martinii (see footnote, p. 16) remains a formidable pest in Queensland, 



Australia. 



Plate 7 (Opposite) 



Cochineal (Dactylopius opuntiae) on a segment of Opuntia iner?nis. Below: 0. 

 aurantiaca at Warwick, Queensland, being attacked by cochineal {Dactylopius 

 sp. near confusus Cockerell). 



