ANDRICUS CIRRATUS. 53 
The late Miss E. A. Ormerod, LL.D., found some of 
these galls on a tree of (Quercus cerris in Kew gardens 
in the year 1878, which, although not exactly cor- 
responding with the continental form of this species, 
were, however, considered by Cameron to be sufficiently 
hike those of A. circulans to warrant the inclusion of 
this gall in the list as British. 
For many years I have most carefully examined 
stubs and trees of Q. cerris but have failed to find the 
galls. 
During dry and hot weather the long linear scales, 
which are a noticeable feature of Q. cerris, close 
towards one another over the galls and hide them from 
view to so great an extent that detection is difficult, 
but when the atmosphere is damp the scales relax and 
stand out in such a manner as to allow the galls to be 
seen. 
These galls are gregarious in their manner of growth, 
occurring in clusters of three, four, or even eight, and 
they are sometimes so closely packed together as to be 
considerably flattened ; at times there may be one gall 
in the centre with others arranged round it in a circle. 
The normal shape is an elongate ovoid and very similar 
to small ant pups. The walls of the gall are very 
thin. 
The resemblance of these galls to those of the closely- 
allied species, A. burgundus, Gir., is very great. The 
imagines, however, are quite different, and in addition 
to this, the galls may be distinguished from each other 
by the fact that those of A. burgundus do not appear 
until about five weeks later than those of A. circulans. 
Andricus cirratus, Adler. 
(Plate XIV, inset.) 
Andricus cirratus, Mayr, Cameron. 
English name of gall.—‘‘ The Tufted Gall.” 
Position of gall.—On staminate catkins of Q. sessiliflora. 
Manner of growth.—Gregarious, pilose, concealed. 
