DESCRIPTIONS OF THE PLATES 
PLATE I 
FIG. 
1. Upper surface of an oak-leaf, showing peripheral death in summer, 
resulting from the presence of galls of Andricus ostreus. (§.) 
2. Lower surface of the same leaf, with galls of Andricus ostreus, and 
scars where others had fallen away. (§.) 
3. Lower surface of an oak-leaf, with two galls of Neuroterus lenticu- 
laris. (£.) 
4. Three galls on midrib of an oak-leaf caused by the presence of the 
larvae of Andricus ostreus. (f.) 
5. Scar after detachment of gall of Andricus ostreus. (|.) 
PLATE II 
1. Galls of Pontania proximo, on leaves of Salix fragilis — (a) (a) fully 
developed on the lower surface ; ( b ) ( b ) ditto on upper surface ; 
( c ) immature galls of second brood on young leaves. (§.) 
2. Gall showing position of orifice. (-J.) 
3. Section, (f.) 
4. Gall of Pontania pedunctili on lower surface of leaf of Salix caprea. 
(i) 
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. (U) 
2. Section of gall of R. rosae in its early state. (§.) 
3. Section of mature gall of R. Rosae , showing larval cavities, (f.) 
4. Galls of Rh. rosarum on leaflets of Rosa canina. (\.) 
5. A detached gall of Rh. rosarum. (|.) 
6. Rhodites rosarum. (f.) 
7. Galls of Rhodites eglanteriae on leaflets of R. canina. (\.) 
8. Section of gall of Rh. eglanteriae, showing larval cavity, and two o 
inquilines. (}.) 
9. Larva of Rh. eglanteriae. (f.) 
10. Rhodites eglanteriae. (f.) 
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