i _30 Plant Galls from Selby and York. 
Perrisia marginem-torquens Winn. On various long-leaved willows on 
the river bank above Selby. 
Rhabdophaga terminalis H. Low,- On 5 . fragilis, river bank above Selby . 
On S. fragilis and alba, Askham Bog. 
R. rosaria H. Low. On 5 . alba, Askham Bog. 
R. salicis Schrk. On 5 . cinerea X repens ,■ Askham Bog. 
Iteomyia capreae Linn. On S . cinerea, on the Bubwith Road and Askham 
Bog. 
I. capreae Linn. var. major KiefL On the same in the same places, but 
sparsely. 
Perrisia populeti Rubs. On two young saplings of aspen in Askham Bog. 
P . urticae Perr. On common nettle, en route to Askham Bog. 
P . tortrix H. Low. On a hedgerow bush of Prunus' domestica, garden at 
the corner of the road to Tadcaster in plenty . 
P. ulmariae Bremi. In plenty, and P. pustulans Rubs, in much less 
quantity, both on meadow sweet, Askham Bog. 
P. plicatrix H. Low. On brambles, commonly- throughout both routes. 
P. crataegi Winn. On hawthorn, abundant everywhere. 
P. viciae Kieff. On Vida cracca, river bank above Selby, and Askham 
Bog. 
P. lathyri Kieff and P. lathyricola Rubs. On meadow vetchling, as the 
last . 
P. loticola Rubs. On marsh lotus. Several places on Skipwith Common 
and Askham Bog. 
Macrolabis corrugans F. Low. On hogweed, en route to Askham Bog. 
Perrisia fraxini Kieff. and P. fraxinea Kieff. On ash, on the river 
bank above Selby. 
P. hygrophila Mik. On marsh bedstraw, Askham Bog, abundantly. 
Urophora solstitialis Linn. On black knapweed, river bank above Selby. 
Rhopalomyia millefolii H. Low. On yarrow, as the last. 
R. tanaceticola Krsk. On tansy, approach to Skipwith Common by the 
bye-road from the Bubwith Road, close to the farm. It occurs 
freely in several localities about Huddersfield. 
Homoptera. 
Livia juncorum Latr. On rushes at Askham Bog, in plenty, but noted 
on the previous Saturday by other members of the Union (Dr. 
Pearsall) . 
Pemphigus ajjinis Kalt. On black poplar, river bank above Selby. 
Schizoneura ulmi Linn. On both species of e]m, York district, common 
and abundant. 
Aphis atriplicis Linn. On Atriplex p atula and white goosefoot, river 
banks above Selby, the latter in a tilled field. 
A . padi Linn. On blackthorn, en route to Askham Bog. 
Hyalopterus pruni Fabr. On hedge Prunus, as last. 
Myzus oxyacanthae Koch. On crab apple, river bank above Selby. 
Psyllopsis fraxini Linn. On ash, as last. 
Psyllid spec. Houard No. 5313. On Galium cruciata, river bank above 
Selby. 
Acari . 
Enophyes galii Karp. On gposegrass, river bank above Selby. 
The following all occurred in Askham Bog, E. tenuis Nal., on a 
grass ; E. brevitarsus Fckn., E. nalepai Fckn., and E. spec. Houard 
No. 1135, on alder ; E. pyri Pgnst. and E. goniothorax Nal., on 
hawthorn ; E. tetanothrix and salicis Nal., on Salix cinerea ; E. 
spec. Houard S. 53 and E. spec. Houard S. 59, on S. alba ; E. 
macrochelus Nal., on sycamore ; E. varius Nal., on aspen. 
Eelworm. 
Tylenchus spec. On stems, Pimpinella magna, river bank above Selby . 
Naturalist 
