148 THE ENTOMOLOGIST. 
Britain, although, doubtless, like all the Dryophanta galls, it 
does occasionally occur in profusion; but it is Divisa which 
is so often met with, and in such great numbers. I have in 
my collection a small twig with eleven leaves, on which are 
ninety-four galls; and I believe Mr. Newman had specimens 
of leaves more densely populated than that. The range of 
Divisa in Britain is commensurate with that of the oak. 
Does Schlechtendal, in his notes, refer in part to Divisa? as 
he only mentions Disticha and Agama in the ‘ Zeitung,’ from 
which we might infer that he had not then separated the two 
species, Agama and Divisa; for in Mayr’s two essays on the 
Synergi and Torymide we have three species of Synergi and 
two species of Torymide, bred by Schlechtendal from Divisa 
galls; and only one species of Synergus, and none of the 
Torymidez, from Agama or Disticha; clearly showing that 
Divisa must occur in Saxony, and, from the above, might 
reasonably be considered the commonest species of the 
three. Formerly he might have been following Hartig, who 
says of Agama,—“ Sometimes in very great numbers on the 
leaves of young oaks;” and of Divisa— Not common, near 
Brunswick.” Under Agama we also have from Schlechtendal 
some interesting remarks on the inmates of the galls; he 
says—“ Out of one hundred galls, which I collected for 
breeding from, eighty-eight were fully matured, and twelve 
remained small: the former only produced twelve specimens 
of the fly, and ten parasites and inquilines, in the same year; 
the remaining sixty-six wintered, and produced in the spring 
partly Pteromalidz and partly Synergus species; no Cynips. 
Of the twelve small galls three produced parasites and inqui- 
lines in the same autumn; the remaining nine wintered.” 
Here, again, we have evidence of Divisa, as reference is made 
to inquilines, both in autumn of the first year and spring of 
the second; a state of things, according to Mayr, existing 
commonly but in Divisa, where we have Synergus albipes 
occurring in August of the same year, and Synergus Tscheki 
and §. pallicornis in March and April of the second. All 
three species were received from Schlechtendal; 8S. palli- 
cornis, also, from Reinhard (Saxony). In the ‘Scottish 
Naturalist’ (vol. ii. pp. 62, 161) Mr. Cameron has two notes 
on the mode of life of Synergi in these galls. The recorded 
parasites of this species are—Syntomaspis cyanea, Bok., 
