DESCRIPTIONS OF THE PLATES 



PLATE I 



FIG. 



I. Upper surface of an oak-leaf, showing peripheral death in summer, 

 resulting from the presence of galls of AndrUus ostreus. (|.) 



■2. Lower surface of the same leaf, with galls of Andricus ostreus, and 

 scars where others had fallen away, (f . ) 



3. Lower surface of an oak-leaf, with two galls of Neuroterus lenticu- 



laris. (f.) 



4. Three galls on midrib of an oak-leaf caused by the presence of the 



larvae of Andricus ostreus. {\.) 



5. Scar after detachment of gall of Andricus ostreus. (\.) 



PLATE II 



I. Galls of Pontania proxima on leaves of Salix fragUis — (a) (a) fully 

 developed on the lower surface ; (6) (6) ditto on upper surface ; 

 (cj immature galls of second brood on young leaves, (J ) 



3. Gall showing position of orifice. (|.) 



3. Section. (|.y 



4. Gall of Pontania pedunculi on lower surface of leaf of Salix caprea. 



5. Upper surface of the -leaf, (f.) 



6. Section of gall, showing frass. (|.) 



7. Larva, (f.) 



8. Pontania salicis. (f.) 



9. Gall of P. salicis on lower surface of leaf of Salix purpurea. (^.) 



10. Upper surface of the leaf. (}.) 



11. Section of gall, (f.) 



PLATE III [Frontispiece) 



1. Gall of Rhodites rosae on bud of Rosa canina. (^.] 



2. Section of gall of R. rosae in its early state. (|.) 



3. Section of mature gall of R. Rosae, showing larval cavities. (|.) 



4. Galls of Rh. rosarum on leaflets of Rosa canina. {I.) 



5. A detached gall of Rh. rosarum. (|.) 



6. Rhodites rosarum. (^.) 



7. Galls of Rhodites eglanteriae on leaflets of R. canina. (}.) 



8. Section of gall of Rh. eglanteriae, showing larval cavity, and two 



inquilines. (\.) 



9. Larva of Rh. eglanteriae, (f .) 

 10. Rhodites eglanteriae. (f .) 



260 



