Hymenoptera: Cynipidae - gall wasp Andricus lignicolus / Andricus lignicola Cola-nut Gall Agamic generation (Cola-nut Gall) - photographs on Quercus, Oak Adult female ex gall Hosts: Agamic generation on Quercus frainetto, petraea, pubescens, robur Sexual generation on Quercus cerris Agamic - hard, scaly, ovoid galls that often occur in small groups. Initially greyish becoming brown as they mature, can persist for several years Sexual - group of small bud galls. Sexual galls and adults of A.lignicola, corruptrix, kollari are very difficult to separate

Andricus lignicolus, Cola-nut Gall
Lytchett Minster and Upton, Dorset. August and December 2017. Adults ex galls April 2018