DESCRIPTION OF THE PLATES 
261 
PLATE IV 
FIG. 
1. Gall in an oak-bud arising through the presence of the larvae of 
Biorrhiza pallida, (|.) 
2. Ditto. (§.) 
3. Biorrhiza pallida 3 . (£.) 
4. Ditto ?. (£.) 
5. Galls of Biorrhiza aptera on oak-root. (J.) 
6. Ditto, section. (}.) 
7. Section, (f.) 
8. Section, with wasp emerging, (f.) 
9. Biorrhiza aptera. (J.) 
PLATE V 
1. Galls of Ncuroterus baccarum on staminate flowers of the oak. (^.) 
2. Section of a gall. [}.) 
3. Ncuroterus baccarum $ . (|.) 
4. (a) {a) Galls of Ncuroterus lenticularis. (L) 
( b) ( b ) Ditto of Ncuroterus fumipennis. {\.) 
5. Section of gall of N. lenticularis. (J.) 
6. Early stage of gall of N. lenticularis. ($.) 
7. Ncuroterus lenticularis. (V^) 
8 . (c) Gall of Ncuroterus vesicator. (£.) 
(^) Ditto of N. albipes. (^.) 
9. jy) Galls of Ncuroterus numismatis. (£.) 
(/) Ditto of N. laeviusculus. (^.) 
10. Section of gall of N. laeviusculus. (\.) 
11. Gall of Ncuroterus vesicator. (D 
12. Section of gall of N. numismatis. (£.) 
13. Gall of N. numismatis. ({,) 
14. Gall of Neuroterus tricolor. (^.) 
15. Section of gall of Neuroterus fumipennis. (j.) 
PLATE VI 
1. Normal flower-spike of Plantago media. (§.) 
2. Flower-head of P. media galled by larva of Mecinus pyraster. (£.) 
3. Mecinus pyraster. (f .) 
4. Gall caused by larvae of Ceuthorrhynchus hirtulus on root of Erophila 
verna. (^-.) 
5. Ceuthorrhynchus hirtulus. (f.) 
6. Gall of C. hirtulus. (f.) 
7. Branch of Populus tremula attacked by Saperda populnea. (£.) 
8. Ditto, with galls caused by the presence of the larvae of Saperda 
poPulnea. [\.) 
9. Saperda populnea ^ . (£.) 
10. Ditto (J. (f.) 
11. Larva of S. populnea. (£.) 
