46 BRITISH OAK GALLS. 



TEEMS EMPLOYED IN THE SYNOPTICAL TABLES. 



The foil oiring terms employed in the synoptical tables 

 of each gall are intended to convey these meanings : 



" English name of gall ": The majoritj of the English 

 names occur in ' Alternating Grenerations,' and are 

 very appropriate. 



"Position of gall": This indicates where the gall is 

 normally situated. Deviations are referred to else- 

 Avliere. 



"Manner of growth": The general appearance of 

 the gall ; its shape, etc., and whether concealed or 

 obvious. 



"Colours": The first mentioned indicates that the 

 gall is of that colour when in earliest stages of growth, 

 and that it assumes the shades and tints following 

 until it arrives at or passes maturity, when it is usually 

 of that colour named last. 



"Average dimensions of a mature specimen": These 

 must not be regarded as hard and fast measurements, 

 but more as guides to the collector and student, 



"May be sought during the months of": The 

 months mentioned are inclusive. 



"Growth is complete b}^ the end of " : With refer- 

 ence to galls, such as the Neuroterus, Biorliiza, and 

 other genera of similar growth, the month stated indi- 

 cates that the galls complete the stage of growth in the 

 situations in which they began growth, and not that 

 they have arrived at a condition in which the imagines 

 always emerge. It must be borne in mind that many 

 galls expand considerably with the return of spring. 



