Plant Galls ■ observed near Scarborough. 195 
Vaccinium vitis-idaea Linn. : — Exobasidium vaccinii Wor. Bloody Beck 
Moors . 
Erica tetralix Linn. :—Perrisia sp. White cocoons distorting the stem. 
Frequent on the moors. 
Nepeta hederacea Trev. : — Oligotrophus bursarius Bremi. Oliver’s Mount 
and Ravenscar. 
Plantago lanceolata Linn. : — Leaves swollen on upper surface with curving 
lines suggestive of Eriophyes, but nothing detected on examination. 
Beast Cliff. 
A triplex patula Linn. : — Aphis atriplicis Linn. Seamer Moor. 
Rumex acetosella Linn. : — Apion sp. Deepdale, Oliver’s Mount. 
Buxus sempervirens Linn. : — Psylla buxi Linn. Ravenscar. 
Ulmus glabra Huds. : — Schizoneura ulmi Linn. Oliver’s Mount and 
Ravenscar. 
Urtica dioica Linn. : — Perrisia urticae Perris. Pickering, Cloughton, 
Seamer Carr House and Robin Hood’s Bay. 
Betula alba Linn. : — (i) Eriophyes rudis Canest., Hayburn Wyke. (ii) 
E. lionotus Nal., Hayburn Wyke. 
B. tomentosa Reith and Abel : — Contarinia betulina Kieff, Beast Cliff. 
Alnus rotundi folia Mill. — (i) Eriophyes nalepai Focken., Ellerburn, 
Cornelian Bay, Langdale, Jugger Howe Dale and Fyling Hall 
Station, (ii) E. brevitarsus Focken. Ellerburn and Jugger Howe 
Dale. 
Corylus avellana Linn. : — Eriophyes avellanae Nal. Near Fyling Hall 
Station . 
Quercus pedunculata Ehrh. : — (i) Andricus fecundator Hartig., Hayburn 
Wyke, Cross Cliff and near Evan Howe. (ii) Neuroterus albipes 
Schenck, near Fyling Hall Station, (iii) N. laeviusculus Schenck, 
Hayburn Wyke, Howe Dale and near Fyling Hall Station. (iv) 
N. numismatis Oliv., Hayburn Wyke, Cross Cliff and near Ravens- 
car. (v) Dryophanta divisa Hartig., Scalla Moor, and near Fyling 
Hall Station. (vi) D. longiventris Hartig., Ellerburn and 
Hayburn Wyke. (vii) Andricus ostreus Giraud, Raincliffe Woods, 
Ellerburn, and near Fyling Hall Station. 
Q. sessiliflora Salisb. : — (i) Neuroterus laeviusculus Schenck, Howe Dale, 
Bloody Beck and Harwood Dale, (ii) N. vesicator SchL, Harwood 
Dale. (iii) Dryophanta agama Hartig., Harwood Dale. (iv) 
D. longiventris Hartig., Harwood Dale, (v) D. folii Linn., Bloody 
Beck. (vi) Andricus ostreus Giraud., Harwood Dale and Bloody 
Beck, (vii) Macrodiplosis dryobia F. Low, Bloody Beck. 
Fagus sylvatica Linn. : — Oligotrophus annulipes Hartig., Hayburn Wyke. 
Salix pentandra Linn. : — Cryptocampus medullarius Hartig., Raincliffe 
Woods. 
S. triandra Linn. : — Rhabdophaga nervorum Kieff. Near Cowgate Slack. 
S', fragilis Linn. : — (i) P. bridgmani Cam., Cornelian Bay. (ii) Crypto- 
campus testaceipes Zadd., Cornelian Bay, (iii) Perrisia terminalis 
H. Low, Cornelian Bay and Tan Beck. (iv) Eriophyes sp. 
(Houard 591), Cornelian Bay. 
S. alba Linn. : — (i) Perrisia terminalis H. Low, cliffs south of Scarborough 
and Cornelian Bay. (ii) Eriophyes sp. (Houard 628), Cornelian 
Bay. 
S. purpurea Linn. : — (i) Pontania salicis Christ, Wrench Green and 
Cornelian Bay. (ii) P . viminalis Hartig., Cornelian Bay, (iii) 
Rhabdophaga nervorum Kieff., Cornelian Bay. (iv) R. salicis 
Schrank, Cornelian Bay. (v) Perrisia terminalis H. Low, 
Cornelian Bay. 
S. viminalis Linn. : — Perrisia marginem torquens Winn. Wrench Green, 
Oliver’s Mount and Cornelian Bay. 
S. caprea Linn. : — -(i) P. bridgmani Cam., Ravenscar. (ii) Cryptocampus 
ater Jurine, Harwood Dale Moor, and cliffs, Robin Hood’s Bay. 
1922 June 1 
