xx Journal of Proceedings
Saturday, May 28th, 1881.—Ordinary Meeting.

The sixteenth Ordinary Meeting was held at the head-quarters at seven
o'clock, the President in the chair.
Donations of books or pamphlets (exclusive of exchanges) were
announced from Miss M. Bentley (6 vols.), Dr. Chambers (4 vols, folio),
Mr. J. E. Harting, Mr. Fisher Unwin, and Mr. W. White. A unanimous
vote of thanks to the donors was passed.
The Librarian announced that during the recess the Library would be
open for the exchange of books every Thursday evening from seven to
nine o'clock.
The following were balloted for and elected members of the Club:—
Miss Madeline Bentley, Samuel D. Clippingdale, John Collingridge,
George Corble, Gr. S. Gibson, J.P., F.L.S., D. G. F. Macdonald, J.P.,
LL.D., C.E., &c. Major Munro, Burnett Tabrum, J. Smyth Till,
Mrs. Warburg, and George Weller, M.R.C.S.
Mr. English exhibited some flowers preserved by his process, illus-
trative of the advance he was still making in working out the practical
details.
Mr. W. Cole said he thought the members would be pleased to hear
that, at the Grays Meeting, an addition to the fauna of Essex had been
made. Mr. W. F. Gwinnell pointed out to him a reddish gall upon the
mugwort (Artemisia vulgari)), which he had failed to recognise; but on
submitting specimens to their Vice-President, Mr. Fitch, that gentleman
had pronounced it to be a gall, new not only to Essex, but to Britain—
made by one of the Gall-gnats (Cecidomyidae), Cecidomyia foliorum,
H. Loew. Mr. Cole could do little more than announce the fact, but
hoped that some information respecting the insect and its gall would
shortly be forthcoming. The Club was promised a complete list of the
Galls of Essex, with biological notes, by Mr. Fitch, which it was hoped
would give an impetus to the collection and study of these interesting and
obscure productions.
Mr. Henry Walker said that, whilst on the subject of galls, he might
call attention to one which he held in his hand, and which he had found
plentifully when taking shelter under some trees at Buckhurst Hill during
the storm that afternoon. They were the production of an Aphis known
to entomologists as Pemphigus bursarius. The presence of the insect, by
some irritating but little understood process, leads to the formation of
large hollow swellings on tho petioles of the leaves of the Lombardy
Poplar. On cutting open the galls the apterous larva; and full-grown
Aphis can readily be obtained, and with a little care the winged forms
could be bred from the infested petioles of the poplar.
The President stated that the members of the Club present at the last
meeting would probably remember that, in connection with Mr. English's
remarks upon "sugaring" for moths, he had suggested the experiment of