88 DESTRUCTIVE INSECTS OF VICTORIA : 



PLATE CXVI. 

 " Common Gum Scale " (Eriococcus coriaceus, Maskell). 



Fig. 



1. Eucalyptus branch with scale, also larvae of Ladybird, Sci/mnus 



sp., also cocoon of Scale-destroying Moth, Thalpochares 

 coccophaga, the larva of which constructs a cocoon with scale 

 insects joined together by a silken web. Natural size. From 

 nature. 



2. Sac of Adult Female. Magnified. After Maskell. 



3. Sac of Male pupa. Magnified. After Maskell. 



4. Adult Female, diagram to show spines. Magnified. After 



Maskell. 



5. Antennae of Female. Magnified. After Maskell. 



6. Dorsal spines of Female. Magnified. After Maskell. 



7. Anogenital ring of Female. Magnified. After Maskell. 



8. Larva. Magnified. After Maskell. 



9. Antenna of larva. Magnified. After Maskell. 



10. Hymenopterous parasite on scale. Magnified x 12. After 



Maskell. 



11. Ladybird Beetle, Orcus, parasitic on scale. Magnified x 3. From 



nature. 



12. Scymnus parasitic on scale. Magnified x 3. From nature. 



The Eucalyptus leaves also show " Sooty Fungus," caused by 

 fungus parasitic on the sugar secreted by the scale insects. 



