JOURNAL OF THE ROYAL SOCIETY OF 
WESTERN AUSTRALIA. 
VOLUME XXXII. 
BIOLOGICAL CONTROL IN WESTERN AUSTRALIA. 
PRESIDENTIAL ADDRESS, 1946. 
By C. F. H. Jenkins, YLA. 
Delivered 9th July, 1946. 
CONTENTS. 
Introduction ... 
COLLEMBOLA 
Sminthuri(la) ... 
Hemiptera 
Pentatomidic 
Jassidse 
Aphklula* 
Coccidw 
COLEOPTERA 
Bnichida? 
Biptera 
Trypetidic 
Muscida? 
Calliphorida.* ... 
Lepidoptera 
Plutellida.' 
Pyralida? 
Gelechida* 
Pierida* 
Vertebratp:s ... 
1 
3 
4 
5 
5 
7 
11 
12 
13 
14 
14 
15 
15 
16 
16 
TNTRODrCTION. 
No method of combating pests has appealed so generally to the ])opular 
fancy as that usually known as biological control. This is readily understand- 
able' for it involves the use of one creature to subject another and reduces to 
a minimum all manual lalionr. Despite their general appeal, the ]>rinciples 
15775/2/48—750 
