48 BRITISH OAK GALLS. 
Except when otherwise specified, the galls may be 
found on either Quercus pedwnculata and Q. sessilifiora. 
The word “gall” is held to mean the actual growth 
surrounding the cavity containing the larva, whether 
it be thin, as that of Spathegaster albipes; or thick as 
that of Dryophanta scutellaris; or the tissues which 
surround two or more larval cells, such: as Teras 
terminalis or Aphilothriz radicis. In three species, 
Andricus curvator, A. inflator, and Aphilothria fecunda- 
trix, it is necessary to remember that the actual larval 
chamber is concealed within a non-adherent case, or 
by leaf scales, which may be quite correctly also 
termed the gall. 
All the specimens illustrated by photographs (except 
Plates II, XXXII, LX, div. B, and LXI), were 
gathered by the author within a radius of ten miles of 
Hastings. 
Fre, 4.—mm., em., and inch scale. 
