28 



THE ENTOMOLOGIST. 



large. From this form a Synophus is developed, which 

 perhaps is generally smaller, but differs in no way from 

 specimens bred from the normal form : as an important fact, 

 1 must mention that I have bred from these galls some 

 specimens which do not in the least differ even in size. The 

 normal flight-time of the gall-fly is March and April; I have, 

 however, extracted living sjiecimens from a gall I cut open 

 the following autumn. With those galls which have been 

 collected some time before the flight- time of the fly, it is 

 certainly advisable to soak them for some hours in water, as 

 the gall-fly is often unable to bite through the wood-layer, 

 which gets very hard and dry from being kept in a room. On 

 the 9lh April of this year I found a leaf of the Turkey oak, of 

 which only one half was developed: to the midrib adhered a 

 mature gall of Synophus politus, from which a fortnight later 

 a fly emerged. — G. L. Mayr. 



Dr. Mayr records Synergus variabilis, Syntoraaspis Cerri, 

 Callimome regius, Megasligmus Synophri, and M. dorsalis, as 

 having been bred from the galls of this species. Will they follow 

 the introduction of Quercus Cerris into Britain? — E.A.FUch. 





Fig. 37. — Andeicus teehixalis. 

 a. Gall of Audricus tei-minalis. 

 h. Section of the same, showing the numerous larva-cells. 



37. Andricus terminalis, Fabr. — This well-known, quick- 

 growing fungus-gall is developed from the terminal, rarely 

 from the axillar, buds of Quercus sessiliflora, Q. pedunculata, 

 and Q. pubescens. It is generally spherical, a little broader 



