85. Salix aurita, 



Rosa canina 



Taxus buccata 



Spiraea Ulmaria 



Urtica dioica 



Veronica chamaedrys 



Viola canina 



Fraxinus excelsior 

 Popuhis tremiila 

 Salix Caprea 

 Fagus sylvatica 

 Achillea millefolium 

 Fagus sylvatica 

 Ranunculus repens 

 Viola canina 

 Atriplex angustifulia 

 Stellaria holostea 

 Juncus articulatus 

 Populus nigra 



Ribes nigrum 

 Ulmus montana 



„ campestris 

 Gleclioma hederacea 

 Salix Caprea 



„ fragilis 

 Rosa canina 



List of Plates 



galled by Cecidomyia rosaria 



rosarum 

 It t2xi 



ulmarise 

 urticpe 

 veronica; 

 violcE 

 Diplosis botularia 

 ,, tremulas . 

 Hormomyia capreae 

 Fagi . 

 millefolii 

 piligera 

 Polycystis pompholygodes 



,, viola: . 



Aphis atriplicis 

 Brachycolus stellariae 

 Livia juncorum 

 Pemphigus bursarius 

 ,, spirotheca 



Rhopalosiphum ribis 

 Schizoneura ulmi . 

 Tetraneura ulmi . 

 Aulax glechomae . 

 Nematus bellus . 

 „ gallicola . 



Rhodites eglanteria; 

 „ nervosus 



rosae 



123. 

 124. 

 125. 

 126. 

 127. 

 128. 

 129. 

 129. 

 ,130. 



„ rubiginosa 

 Rubus fruticosus 

 Populus tremula 

 Ajuga re plans 

 Uaucus carota 

 Betula alba 

 Tilia europaea 

 Vicia sepium 

 Pyrus communis 

 Arctium lappa 

 Centaurea nigra 

 Prunus insititia 

 Lonicera periclymenum „ 

 Papaver dubium and P. Rhi 

 Prunus insititia 

 Potentilla reptar.s 

 A charming spot for galls 



,, rubiginosK 

 Lasioptera rubi . 

 I liplosis tremulae . 

 Eriophyes ajuga; . 

 Asphondylia pimpernellae 

 Cecidomyia betulae 

 tilicola 

 Diplosis loti . 



,, pyrivora . 

 Tcphritis bardana; 

 Urophora solstitialis 

 Exoascus insititise 

 Siphocoryne xylostei 

 s, galled by Aulax papa\ 



Exoascus insitiliae 

 Xestophanes potentillce 



XI 



PAGE 

 202 



204 

 206 

 208 

 210 



246 

 248 

 250 

 252 



256 

 258 

 260 

 262 

 264 

 266 

 266 

 270 

 272 

 274 

 276 

 278 



290 

 292 

 292 

 294 



