DESCRIPTION OF THE PLATES 265 
FIG. 
4. Radical leaf of Ccntaurea Scabiosa , with galls (early state) caused by 
Eriophyes centaureae. (£.) 
5. Leaves of Viburnum Lantana, galled by Eriophyes viburni. (^.) 
6. Gall of E. viburni. ({.) 
7. Ditto, showing aperture on under surface of leaf. ({.) 
8. Ditto, section, (f.) 
9. Shoot of Taxus baccata, with bud galled by Eriophyespsilaspis, ($.) 
10. Bud of Taxus baccata, galled by Eriophyes psilaspsis. (|.) 
PLATE XXII 
1. Bud of Quercus pedunculata, galled by the larva of Dryophanta 
similis. (f.) 
2. Ditto, (f.) 
3. Leaf of Q. pedunculata , with galls caused by the presence of the 
larvae of Dryophanta longiventris , the alternate generation of the 
preceding. (|.) 
4. Section of gall, with D. longiventris that has just emerged from its 
cell, (f) 
5. Buds, with gallsarising from the presence of the larvae of D. Taschen- 
bcrgi. (f) 
6. Leaf, with cherry-like galls caused by the presence of the larvae of 
Dryophanta folii. ($.) 
7. Withered leaf, with gall of D. folii. (§.) 
8. Dryophanta folii. [\.) 
9. Spring leaves of Q. pedunculata, with gall on leaf and one on petiole, 
caused by the presence of the larvae of Dryophanta verrucosa (after 
Adler). (}.) 
10. Ditto, on leaf (after Adler). {\.\ 
11. Ditto, in a bud (after Adler). (f.) 
12. Galls caused by the presence of the larvae of Dryophanta divisa, the 
agamous generation of the preceding. (£.) 
PLATE XXIII 
Leaves of Ulmus montana, galled by Oligotrophus Leetnei — (a) distorted 
young leaves, with galls on the midrib ; (6) upper surface of leaf, 
showing apertures of galls ; ( c) ( c\ two leaves, showing the under 
surface with numerous galls on tne midrib. ($.) 
PLATE XXIV 
Papaver dubium, showing two normal capsules, and one galled by 
the presence of the larvae of Aulax papaveris, causing it to become 
swollen and to droop. ({.) 
PLATE XXV 
A branch of Prunus insititia, bearing four normal fruits, and three 
that are greatly hypertrophied through the presence of the 
fungus Exoascus pruni. (£.) 
