OF EPPING FOREST.
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eggs in the adventitious buds near the base of the tree.
Dryophania similis galls are formed at the end of April or the
beginning of May; from these the flies emerge usually about the
middle of the month, earlier as a rule than D. taschenbergi.
This sexual generation oviposits on the undersurface of the
oak leaf, the resulting gall, D. longiventris, appearing at the end
of July or beginning of August.
OCCURRENCE IN EPPING FOREST.
Dryophania longiventris. Very plentiful, but less so than
D. folii. When these galls are kept in a room the flies may
emerge in October, and I have taken mature flies from the galls
in September. First appearance noted July 19th. I met with
only a few specimens of Dryophania similis, mostly on twigs
growing adventitiously from the trunks of the trees, especially
near the base. First appearance noted May 10th.
(9).—Agamic Generation. III. Dryophanta divisa (Htg.)
Inquilines. Synergus pallicornis (Htg.), S. tscheki (Mayr), and
S. albipes (Htg.)
Gall.
The galls in this instance are more numerous on the leaf than is
the case with the corresponding generations of preceding species
of this genus. They are found on the under-surface of the leaves.
Shape: Roundish, with a depression at the top. The larval
cavity is small and the walls are thick. It is hardy and woody.
Colour: Red when young, becoming brown with age.
Imago.
Colour: Brown, may be slightly reddish. Antennae: Black. Thorax:
Mesonotum pubescent, with two black stripes, punctured anteriorly. Sutures
black. Abdomen: Black. Legs: Brown with base of coxae infuscated;
trochanters, and more or less of the tarsi, black.
(9).—Sexual Generation. IIIa. Dryophanta verrucosus
(Schltdl).
Gall.
I have not found this gall in Epping Forest. Elongated with
rounded extremities, it may appear on the leaves or buds.
Colour: Varies from green and greenish yellow to red.
The gall secretes a fluid in its vesicles, which covers it as a
protection against parasites, giving it a glossy appearance.
Imago.
Identical with preceding sexual forms.