THE ENTOMOLOGIST. 76 
several projections, and in its being larger in size (fig. 21 d). 
The first form is found on Quercus sessiliflora and Q. pedun- 
culata; the second on Q. pubescens; the third on Q. sessili- 
flora. The imago, generally matured by the beginning of 
winter, emerges in the following March or beginning of 
April.—G@. L. Mayr. 
Five species of Synergus have been bred from the variable 
galls of this species, four of which, viz. Melanopus, Reinhardi, 
Pallicornis, and Vulgaris, emerge in the spring and summer 
of the second year; whilst Facialis is produced in the 
autumn of the first year.. Ceroptres arator finds a home in 
this species, as in many others. As parasites we have Calli- 
mome abdominalis, C. regius, and two species of Megastigmus, 
viz. M. stigmaticans, Fab. (= giganteus, Kollar), and M. dor- 
salis, Fab. (= Bohemanni, Raiz.). The gall has not been 
found in Britain.— EL. A. Fritch. 
22. Cynips coriaria, Hart.— Fig. 22. 
This species produces a gall % 
which, in its shape, reminds one y 
somewhat of the variety Coro- 
nata of the preceding species. 
The simplest and most regular 
specimens are hemispherical, 
with the convex part attached 
to the stem, and the broad disk & 
recurved in the middle. From € 
the junction between the disk “ 
and the convex surface, or from 
the disk itself, emanate many 
long projections, which taper 
off and point either towards the 
gall or from it. Occasionally 
several of these projections 
unite, and then they form a 
lamina terminating in several 
points. Other specimens are 
more or less spherical, and their 
projections irregular. A trans- 
verse section of the gall usually measures between one and 
two centimetres, exclusive of the projections, but speci- 
mens occur both larger and smaller; the average of the 
CYNIPS CORIARIA. 
