276 MOSLEY: YORKSHIRE GALLS. 
On Taxus baccata. 
Leaves at end of shoots formed into dense rosette. Caused by 
a midge (Cecidomyia taxt). Huddersfield, Bretton. 
*Terminal buds swell and never expand. Caused by a mite 
(Phytoptus taxi). Huddersfield. 
On Tilia europza. 
Green or red berry gall on twig or petiole. Caused by Sara 
tilicola % 
Claw or nail-shaped galls on face of leaf. Caused by a mite 
(Phytoptus tiie). Rotherham. 
On Trifolium repens and T. pratense. 
Leaflets podded and red. Caused by a midge (Cecidomyia 
trifolit). Brockholes. 
On Triticum repens. 
*Shuttle-shaped, imbricate galls in leaf-axil. Caused bya dipteron 
(Scatopse notata). This gall was first given me by Mr. J. W- 
Carter, who found it near Bradford. Since then I have found 
it commonly near Huddersfield. The fly has been named for 
me by the kindness of Dr. Meade, who adds, ‘I do not know 
that anything has been observed before of its life-history.’ 
On Ulmus campestris. . : 
*Leaf thick, pale, and curled down. Caused by an aphis 
(Schizoneura ulmi). Common. 
On Urtica dioica. 
*Base of leaf and petiole swollen. Caused by a midge (Cecidomyia 
urtice). Common. 
On Veronica chamedrys. 
*Hairy knobs of leaves at ends of shoots, Caused by a midge 
(Cecidomyia veronice). Common. 
The above list must, necessarily, be far from complete, but the 
following list of plants on which additional galls or pseudo-galls have 
been found, may lead to the detection or recording of additional 
species, 
Acer campestre. Leaf. 
Achillea millefolium. Leaf-axil, and root-stock. 
Achillea ptarmica. Flower. 
Alnus glutinosa. Leaf. 
Ammophila arenaria, m. 
Astragalus hypoglottis. Leaflet podded. 
arbarea vulgaris. Leaflet thick. 
Betula alba. Flower. 
