262 BRITISH GALLS 



PLATE VIJ 



FIG. 



I. Polygonum aviculan, with galls caused by the presence of the larvae 



of Augasma aeratella. (\.) 

 ■i. Augasma aeratella. (^.) 



3. Longitudinal section of gall of A. aeratella. (f.) 



4. Leaf of PoptUus trmiula, with the petiole hypertrophied through the 



presence of the larva of Neptictila argyropeza. (f .) 



5. Nepticttla argyropeza. (J.) 



6. Stem of EpiloUum parviflorum, with gall caused by the presence of 



the larva of Mompha decorella. (|.) 



7. Mompha decorella. (f .) 



8. Resinous gall of Rhyacionia {Reiinia) resinella in shoot of Piims 



sylvestris. (J.) 

 g. 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. (J.) 



2. Perrisia veronica S ■ (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 



termitialis. (J.) 



5. Perrisia terminalis 3 • V- 



6. Papsi oi P. terminalis. (f.) 



7. Twig of Tilia vulgaris, with galls caused by the presence of the 



la.rva.e oi Contarinia tiliarum. (J.) 



8. Section of gall, showing larvae. (4.) 



g. 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. (J.) 



11. 'L&xvasol M. dryoUa (J.) 



PLATE IX 



I. Galls caused by the presence of the larvae of Oligotrophus annulipes 



on the upper surface of leaves of Fagus sylvatica. (}.) 

 ^. Under surface of an attacked leaf, fi.) 



3. A withered leaf retaining chlorophyll around two galls. (}-.) 



4. Section of gall of 0. annulipei, showing cavity with larva, (f .) (The 



line to the left of the section indicates the actual length of a 

 crawling larva.) 



5. Oligotrophus annulipes. (|.) 



6. Lower surface of leaves of Comus sanguinea, with immature galls of 



Oligotrophus corni. (J.) 



7. Leaves of ditto, with mature galls. {{.) 



8. Section of gall of O. corni, showing pupa in cavity. (J.) (It is 



placed incorrectly ; the aperture should be below.) 



9. Pupa of 0. corni. (J.) (The line immediately above it indicates 



the actual length.) 



10. Twig of Salix caprea, with galls caused by Rhdbiophaga salicis. {i.) 



11. Section of same, showing the larvae. (|,) 



