: 4 Aagust 16 Stal 
241 
YORKSHIRE GALLS: 
ADDITIONAL SPECIES AND NEW LOCALITIES. 
S. L, MOSLEY, F.E.S., 
Beaumont Park Museum, Huddersfield; Author of ‘ British Birds, Nests, and Eggs,’ etc. 
SINCE my last list (‘Naturalist,’ 1892, p. 337), the long-expected 
fourth volume of Cameron’s ‘Phytophagous Hymenoptera’ has 
appeared, and though certainly a very welcome volume, I must own 
to just a little disappointment. Still, it will be very useful as bringing 
up to date what the author has been able to gather on the subject. 
From my own observations, and material forwarded to me by 
correspondents in various parts.of Yorkshire, I am able to give 
a few more species, and some additional localities for some of those 
already recorded. As before, I take them under the plants in 
alphabetical order. 
On Acer campestre. Maple. 
Small scarlet pimples on upper-side of leaf.. Caused by a mite 
(Phytoptus myriadeum). For a long time I have been on 
the look-out for this gall in Yorkshire, feeling sure it should 
occur. I have never found it, however, until June 15th, 
when I found it abundantly in a lane not far from Askern. 
Messrs. Parkin, Gerrard, and Greenwood were with me at 
the time. Some of the leaves were quite covered with galls. 
On Achillea ptarmica. Sneezewort. 
I have been able to verify the somewhat vague notice sent me 
by Mr. Inchbald, of the occurrence of the gall of Cecidomyta 
ptarmice in the Huddersfield district. I found a number of 
galled plants at Farnley Hey, and Mr. Parkin gave me 
a quantity found by him in Ryhill Pits near Wakefield, from 
which I have since (June 21-28) bred the flies. | The flower- 
head is galled into a solid pinkish hairy knob, with a flattish 
top; almost unrecognisable as the poreenes of Achillea 
: plarmica. — 
On Alnus glutinosa. Alder. 
Bladder-like swellings, standing up a fines from the upper 
surface of the leaf. These are caused by a mite; I believe 
: ell tots pustulatum Bremi. I found it in great abund- 
in Owston Wood during the Askern excursion; and 
Tha have since met with it freely in Anston Stones. Mr. J. W. 
Carter, of Bradford, had ae given me ocean te 
- <., Soe Seven ace 54 ca . 
Ps 
