122 THE ENTOMOLOGIST. 
the larva-cell in the centre. The gall-makers emerged from 
the end of September to the middle of December. It is 
impossible to mistake this species for the one next described, 
—D. folii, Z.,—as it strictly keeps to the above-mentioned 
oaks.—G. L. Mayr. 
The galls of this and the next species have been much 
confounded together; but as Mayr says that the true D. folii 
of Linné only occurs on the South European species of oak, 
—Q. pubescens,—it is hardly. possible that it can be British. 
I have specimens of D. folii received from Dr. Mayr, and can 
certainly say I never saw galls like them in this country: 
they are spherical, as D. scutellaris, with the texture and 
smoothness of the common D. divisa galls. Our common 
cherry-galls must, therefore, be referable to D. scutellaris, 
and possibly, in a few cases, to D. longiventris. They occur 
commonly in Britain, ranging as far north as Perthshire. I 
found them exceedingly abundant last autumn twelvemonths, 
on the large sappy leaves of the stubs and pollards of the : 
Undercliff, in the Isle of Wight, from which I bred D. scutel- : 
laris from Ist to 21st January, Synergus pallicornis in May 
and June, Decatoma biguttata in May, and Callimome regius 
from May to August. Mayr mentions three species of 
Synergus and two species of Torymus, as connected with 
this species, viz.—Synergus pallicornis, H., appearing in 
May of the second year; Synergus ‘'scheki, Mayr, in April 
of the second year; and Sapholytus connatus, H., as inqui- 
lines; and Callimome abdominalis, Boh., on the authority of 
Hartig; and Callimome regius, Nees, which occurs from 
October of the first year throughout the summer of the second 
year, as parasites. In the galls of. this species, as also in 
those of Cynips glutinosa, C. Kollari, and C. lignicola, 
Callimome regius is in some cases a parasite of the inquiline, 
when it is generally rather smaller. Mayr received one 
specimen of 8. connatus from Tschek, labelled—*“ From 
D. scutellaris gall;” but possibly it might have emerged 
from a gall of A. noduli, occurring in the leaf. In Germat’s 
‘Zeitschrift’ (vol. ii. p. 192), Hartig describes Neuroterus 
inquilinus, and says:—“I once bred a single female from a 
gall of Cynips folii” = scutellaris, Ol. Whether this has 
been confirmed since, | cannot say. We often find single 
Synergus larvee living in small chambers made in the 
