TERMS EMPLOYED IN THE SYNOPTICAL TABLES. 47 
Observations were made in the south of England; 
an allowance of a week or two should therefore: be 
made by the collector in northern localities. 
‘*The typical condition of the gall is ’’: 
‘*Unilocular and unilarval’’: The actual gall struc- 
ture consists of one larval cell only, and contains one 
larva only. 
“Pleurilocular but unilarval’’: The gall structure is 
made up of more than one larval cell (sometimes as 
many as, or more than, fifty cells), but that each cell 
contains one larva only. The expression does not 
include galls usurped by parasites or tenanted by 
inquilines. Parasites usually live in cells (e. g. in gall 
of C. Kollavi), but inquilines merely cause cavities in 
the tissues of the gall. 
‘‘Bilocular but unilarval’’: That within the gall 
structure are two cavities, one of which is occupied by 
the larva; or that a single larval cell is surrounded by 
an envelope of gall-substance which may be thin and 
non-adherent to the larval cell as in Andricus curvator, 
or thick and adherent, as in A. injflator. 
‘‘Parasites, Nos.,” ‘‘Inquilines, Nos.”’: To minimise 
space, and obviate the frequent repetition of names, a 
complete alphabetically arranged list of the parasites 
and inquilines having numbers corresponding with 
those in the synoptical tables, will be found at the 
end of the volume. 
As regards the synonyms of the insects, it should be 
noted that the lists are neither strictly comprehensive, 
nor do the names profess to be placed in chronological 
order, nor is reference made to the literature in which 
they are to be found. 
