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EXPLANATION OF PLATES. 



PLATE IX. 



Fig. 1. Egg of Plesiocoris rugicollis in situ. 



Fig. 2. Surface view of the cap of an egg of Plesiocoris rugicollis in situ. 

 Fig. 3. Eggs of Plesiocoris rugicollis in situ. 

 Fig. 4. A. Egg of Plesiocoris rugicollis. 

 B. Egg of Orthotylus marginalis. 

 Fig. 5. Plesiocoris rugicollis, Instar I. 



Fig. 6. „ „ „ n. 



PLATE X. 

 Fig. 7. Plesiocoris rugicollis, Instar III. 

 Fig. 8. „ „ „ IV. 



Fig. 9. „ „ „ V. 



Fig. 10. „ „ Adult. 



Fig. 11. Atractolomus mali, Instar V. 



PLATE XI. 

 Fig. 12. Apple leaves marked by Plesiocoris rugicollis. 

 Fig. 13. Young apples marked by Plesiocoris rugicollis. 

 Fig. 14. Two apple trees (variety Grenadier). 



A. Sprayed and showing normal growth. 



B. Unsprayed and showing a severe check to the growth of the leaves due to Plesio- 



coris rugicollis. 



