193 
PLANT GALLS OBSERVED NEAR SCARBOROUGH, 
1921. 
HAROLD J. BURKILL, M.A. , F.R.G.S. 
Last year I spent some days at .Scarborough, and then moved 
north to Ravenscar. I was able to keep notes of the various 
species of Plant Galls that I came across, and the following list 
has been compiled from those notes. Some of the items may 
be of interest to other workers of the subject in Yorkshire. 
The host plants are given in order of ‘ The London Catalogue,' 
and I think all the localities can be found on the Ordnance 
Survey Maps of the district. 
Many species were no doubt overlooked, and I know that 
I failed to find several that I had seen in other years, but it 
was impossible to visit all the old spots in the course of a 
month’s holiday. My notes of those earlier years have never 
been worked out into any order, and as I see just now no 
prospect of getting the necessary time to compile a full list, 
the present contribution is offered as an addition to those lists 
that have recently appeared in The Naturalist , in the hope 
that it may help to fill in some blanks in the County record. 
In addition to those in the main list, the following usually 
occurred wherever the host plants were found : — 
Aphis spec. ( Prunus spinosa ) ; Perrisia ulmariae Bremi ( Spiraea ulmaria) ; 
Rhodites rosae Linn., R. eglanteriae Hartig. and P. rosarum Hardy 
(mainly on Rosa canina ) ; P. crataegi Winn., and Eriophyes 
goniothorax Nal. ( Crataegus monogyna) ; P. fraxini Kieff., and 
Psyllopsis fraxini Linn. ( Fraxinus excelsior) ; Perrisia veronicae 
V allot ( Veronica chamaedrys ) ; Neuroterus baccarum Linn., and 
N. lenticularis Oliv. (mainly on Quercus pedunculata ) ; Pontania 
proxima Lieb. ( Salix 5 spp. ) ; Oligotrophus capreae Winn. ( 5 . caprea , 
aurita , cinerea ; its var. major Kieff. on the last two) ; Rhabdo- 
phaga rosaria H. Low on the same three species. 
LIST. 
Capsella Bursa-pastoris Medic., galled by fungus Cystopus candidus Lev., 
near Cay ton. 
Stellaria holostea Linn : — Br achy coins stellariae Hardy. Three places 
near Ravenscar, and also Beast Cliff. 
S. graminea Linn. : — Eriophyes atrichus Nal. Staintondale Moor. 
Hypericum humi fusum Linn . : — Perrisia serotina Winn . Near Falcon Inn . 
Rhamnus catharticus Linn. : — Trichopsylla walkeri Forster. Scalla Moor, 
Pickering. 
Acer Pseudo -pi at anus Linn. : — (i) Eriophyes macrorrhynchus Nal., Eller -r 
burn, (ii) Eriophyide , apparently Houard No, 3976 or 3977, 
Hay burn Wyke. 
A. campestre Linn. : — (i) Diploside (Houard 4027) , Scalla Moor, Picker- 
ing. (ii) Perrisia acevcrispans Kieff., near Stoupe Beck, Robin 
Hood’s Bay. (iii) Eriophyes macrorrhynchus Nal., Pickering, 
(iv) E. macrochelus Nal., near Fyling Hall Station. 
Cytisus scoparius Link. : — (i) Asphondylia mayeri Liebel, Hardhurst Moor, 
(ii) Perrisia tubicola Kieff., Hardhurst Moor. 
1922 June 1 
N 
