262 
BRITISH GALLS 
PLATE VII 
FIG. 
1. Polygonum aviculare, with galls caused by the presence of the larvae 
of Augasma aeratella. (^.) 
2. Augasma aeratella, (■£.) 
3. Longitudinal section of gall of A. aeratella. (f.) 
4. Leaf of Populus tremula, with the petiole hypertrophied through the 
presence of the larva of Nepticula argyropeza. (f.) 
5. Nepticula argyropeza. (|.) 
6. Stem of Epilobium parviflorum, with gall caused by the presence of 
the larva of Mompha decorella. (£.) 
7. Mompha decorella. (\.) 
8. Resinous gall of Rhyacionia ( Retinia) resinella in shoot of Pinus 
sylvestris. (£.) 
9. Rhyacionia resinella. ($.) 
10. Section of gall of R. resinella, showing the larval cavity. (£.) 
PLATE VIII 
1. Veronica Chamaedrys , with gall caused by the presence of the larvae 
of Perrisia veronicae. (\.) 
2. Perrisia veronica $ . (f.) 
3. Larva of P. veronicae amidst the white hairs of the gall, (f.) 
4. Twig of Salix fragilis, with leaves galled by larvae of Perrisia 
terminalis. (^.) 
5. Perrisia terminalis $. Y 9 -. 
6. Pupa of P. terminalis. (£.) 
7. Twig of Tilia vulgaris, with galls caused by the presence of the 
larvae of Contarinia tiliarum. (L) 
8. Section of gall, showing larvae. (£.) 
9. Under surface of leaf of Quercus pedunculata , with galls caused by 
the presence of the larvae of Macrodiplosis dryobia. (£.) 
10. Aspect of upper surface of ditto. (^.) 
11. Larvae of M. dryobia (f.) 
PLATE IX 
1. Galls caused by the presence of the larvae of Oligotrophus annulipes 
on the upper surface of leaves of Fagus sylvatica. (|.) 
2. Under surface of an attacked leaf. (£.) 
3. A withered leaf retaining chlorophyll around two galls. (|.) 
4. Section of gall of 0 . annulipes, showing cavity with larva, (f.) (The 
line to the left of the section indicates the actual length of a 
crawling larva.) 
5. Oligotrophus annulipes. (f.) 
6 . Lower surface of leaves of Cornus sanguinea, with immature galls of 
Oligotrophus corni. (£.) 
7. Leaves of ditto, with mature galls. R.) 
8. Section of gall of 0 . corni, showing pupa in cavity. (^.) (It is 
placed incorrectly ; the aperture should be below.) 
9. Pupa of 0 . corni. (|.) (The line immediately above it indicates 
the actual length.) 
10. Twig of Salix caprea, with galls caused by Rhabdophaga salicis. (£.) 
11. Section of same, showing the larvae. (|.) 
