Hymenoptera: Cynipidae - gall wasp Cynips longiventris Agamic generation - photographs on Quercus, Oak Hosts: Agamic and sexual generations on Q. frainetto, petraea, pubescens, robur Agamic - usually on lowerside of leaf, gall bumpy, pale yellowish with white, pink or red spots or stripes. Very hard wall and small inner chamber Sexual - hairy oval bud galls, 2mm tall without bud scales at base. Hairs long and greyish. Similar: Sexual galls of C. quercusfolii have shorter purplish violet hairs

Cynips longiventris
Broadstone, Dorset. October 2017