List of the Insert Fauna of the County.
137
of its bright green colour. It is
spherical, with a small apical
papilla, and its surface is covered
with inconspicuous raised articula-
tions. The gall is sessile in the ter-
minal or axillar buds ; it somewhat
resembles a miniature melon. The
gall retains its green colour until
mature in late autumn; the gall-
fly emerges therefrom in spring.
Aphilothrix globuli, Hartig (Fig.
25) [agamous form of Andricus
inflator].
Quercus Robur, L. Bud. This
gall somewhat resembles that of
A. globuli, but is purplish green in
colour, and in shape and size
greatly resembles a grain of wheat;
it is sessile, but more deeply seated
in the bud than the above-men-
tioned species, and is by no means
so easily seen, although common.
The gall is single-celled, and occurs
singly in the autumn; it is mature
in October, and the gall-fly emerges
therefrom in April. Aphilothrix
autumnalis, Hartig (Fig. 26) [aga-
mous form of Andricus ramuli] .
Quercus Robur, L. Bud. The
unopened oak-buds are frequently
seen to be pierced with a small
circular hole; if on touching the
apex a small, woody, brown, smooth,
ovate gall is palled out, we have the
inconspicuous gall of A. collaris. It
is almost impossible to find the
galled buds until after the escape
of the fly, when they appear to
Fig. 25. Aphilothrix globuli.
Fig. 26.
Aphilothrix autumnalis
Fig. 27. Aphilothrix collaris.
R