OF EPPING FOREST. 157
The A. inflator galls appear in May, giving rise to the sexual
generation in July.
After fecundation, the females of this generation oviposit in
the axillary or terminal buds, laying one egg in each bud; from
these the A. globuli galls develop in September. The larvae are
full grown in October when the gall falls to the ground, and
pupate in the following autumn, emerging from the gall in April
of the second year.
OCCURRENCE IN EPPING FOREST.
Andricus globuli. Common. First appearance noted August
28th.
Andricus inflator. Common. I have not found this gall so
abundant in Epping Forest as in many other localities. When
the gall has grown old and woody, buds are produced upon it,
which eventually form twigs, so that these galls do not prevent
the growth of the tree. I have often found catkins growing from
buds situated on the galls of this species.
When young they are light yellow in colour, the apex being
a very pronounced red or crimson.
First appearance noted, May 10th.
(15.) Agamic Generation. V. Andricus collaris (Htg.)
Inquiline. Synergus nervosus (Htg.)
Gall.
Found in the bud, usually only only just protruding from
among the scales. This, however, is not always the case, as I
have often found specimens of this gall with only the basal
portion enveloped by the bud scales. The gall penetrates deeply
into the bud axis. Colour: Reddish brown when fresh. The
extreme apex, which is pointed, is lighter in colour, sur-
rounded by a dark brownish ring.
Imago.
Colour: Black, shining. Antennae: Dark. Basal joints, reddish. Thorax:
Smooth and shining, pronotum and base of mesonotum, reddish. Scutellum,
reddish brown. Abdomen: Dark, ventral surface may be reddish. Legs:
Reddish yellow, coxae and sometimes bases of femora, dark. Wings: Hyaline.
(15.) Sexual Generation. Va. Andricus curvator
(Thoms.)