LIST OF ILLUSTRATIONS. 
Page. 
Fig. 1. Map showing life zones and distribution of scale 34 
2. Appearance of scale on bark 36 
3. Young larva and developing scale 39 
4. Development of male insect 41 
5. Adult male 42 
6. Adult female 43 
7. Aplielin us diaspidia How 51 
8. Pent ilia (Smilia) misetta . ..-_-...--..,._. 52 
7 
