23 
ADDITIONS TO THE PLANT GALLS OF 
SCARBOROUGH. 
WM. FALCONER, F.E.S. 
The following plant galls, observed during the first week of 
September last, are either additions to (these are distinguished 
by an asterisk), or extended stations for, the forms recorded 
for the district in The Naturalist for December, 1919, and 
February, 1920. 
Diptera. 
Iteomyia capveae Winn. On Salix capvea and 5 . aurita,* in Raincliff 
Woods ; on 5 . capvea, Cayton Bay. 
*7. cospreae var. major Kieff. On 5 . aurita, in Raincliff Woods, but not 
at all common. 
Rkabdophaga nervorum Kieff. On 5 . capvea, in this instance a swelling 
and torsion of the lateral veins, between Ravenscar and Robin 
Hood Bay. 
Perrisia persicariae Linn. On Polygonum amphibium, Scarborough 
Mere, abundant. 
*P. fructuum Rubs. On mouse-ear chickweed, Ravenscar. 
*P. pustulans Rubs. On meadow sweet, in a damp spot between Ravens- 
car and Robin Hood Bay. 
*P. plicatrix H. Low. On bramble, Raincliff Woods and Robin Hood 
Bay. 
P. rosarum Hardy. On wild rose, Scalby. 
*P. tortrix Rubs. On wild Prunus domestica bushes lining one side of the 
footpath between the Cemetery and Lady Edith’s Drive, in plenty. 
*P. Ibticola Rubs. On Lotus corniculatus , several examples towards 
Scalby Mill. 
Macrolabis corrugans F. Low. On hogweed, the Mere and between 
Ravenscar and Robin Hood Bay. 
* Perrisia fraxinea Kieff. On the ash, Hayburn Wyke and Rievaulx 
Abbey . 
*Oligotrophus bursarius Bremi. On ground ivy beneath some of the 
trees in Lady Edith’s Drive. 
Perrisia galii H. Low. On lady’s bedstraw, cliffs to Scalby Mill. 
* Perrisia spec. Houard, No. 5289, on the same plant in the same locality, 
the same as that unnamed in December, 1919. 
Rhopalomyia millefolii H. Low. On yarrow, cliffs to Scalby Mill, and 
at Robin Hood Bay, in plenty. Doubtless often overlooked from 
the position of the gall, oftener at the base of the stem than else- 
where, and thus hidden by the herbage from casual observation. 
* Perrisia cirsii Rubs. On Carduus arvensis, near Scalby Mill. 
Homoptera. 
*Brachycolus stellariae Hdy. On soft fog grass and mouse-ear chickweed, 
between Ravenscar and Robin Hood Bay. On greater stitchwort, 
Lady Edith’s Drive. 
* Aphis spec. On crab apple, cliffs near Scalby Mill, growing with 
blackthorn, similarly galled. 
* Aphis spec. On hawthorn, near the cemetery. In both the above, the 
aphids had gone, and as more than one species galls the respective 
plants, I have not named them specifically. 
*Psylla buxi Linn. — On box, grounds of the Mere. 
*Trioza urticae Linn. On nettle, between Ravenscar and Robin Hood 
Bay. 
1922 Jan. 1 
