THE ESSEX FIELD CLUB.
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rufimanus (Essex Naturalist, II., 48), the natural history of
the "Essex Emerald" moth, Euchloris (Phorodesma) smaragdaria,
compiled by our Secretary (Ibid. I., 120) and supplemented by
Mr. Fitch (Ibid. 204), my own observation on the tarsal scent-
tufts of the Deltoid moth, Herminia (Aethia) tarsipennalis (Ibid.
II., 113), Mr. Kerry's observation on the migration of Pieris
brassicae at Harwich (Ibid. VI., 205), Dr. H. C. Sorby's notes on
the food of oysters in Essex (Ibid, X., 169), and, among our first
contributions, Mr. Arthur Lister's note on the parasitism of
Rotifers in cysts on Vaucheria (Proc. III., xlv.). An interesting
paper on the worm-eating slug, Testacella scutulum, Sowerby, was
published by Mr. W. M. Webb in the Zoologist in 1893
(XVII., 251) and in the Essex Naturalist (VII., 120). The
slug itself had been found at Buckhurst Hill and elsewhere in
Essex and had been exhibited by Mr. H. C. Snell at our meeting
on March 14th of that year (Ibid. 46).
In connection with this subject it will be found also that we
have not neglected our duty as regards the registration of new
and rare species which have occurred in the County. The first
occurrence observed in Essex, and, in fact, in England, of the
Rhizopod, Clathrulina elegans was recorded by our late member,
Mr. Charles Thomas, in 1884 (Trans. IV., 50), the new Butterfly,
Hesperia lineola was duly noticed (Essex Naturalist, IV., 191),
two new Essex worms, one new to Britain and another belong-
ing to a genus and species new to science had their names and
addresses recorded by the Rev. Hilderic Friend in 1896 (Ibid.
XI., no) and the same writer has also noted the occurrence of a
unique species of well-worm at Chelmsford (Ibid, XL, 1), pre-
faced by a most valuable general introduction to the study of the
Phreoryctes. The discovery of the hitherto unknown male of the
remarkable Hymenopterous insect, Prestwichia aquatica, in a pond
in Epping Forest, was recorded in 1896 by Mr. Frederick Enock
(Ibid. X., 10), while Mr. W. M. Webb notified in 1899 the
occurrence of a species of Woodlouse (Porcellio ratzburgi, Brandt.)
new to Britain, from Warley and (possibly) Brightlingsea (Ibid.
XL, 127).
Some of the communications which have been published by
the Club deal with the marine zoology of particular trawling and
dredging excursions or cruises, such, for example, as Mr.
E. A. Fitch's interesting report on "A Day on the Crouch
River," Mr. Crouch's further notes on the River Crouch