S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

Fig. 4. Plagiotrochus razeti, sexual generation: (A) head of female, (B) head of male, (C) mesosoma of female in dorsal view, (D) in lateral view Gall — Develops in the annual buds of Q. ilex. The gall is usually monolocular, sometimes 2-5 larval chambers can be found in one group on the adjacent leaves, which developed from the same bud; in this case walls of galls are often fused. The gall wall is thin and pubescent at the earlier developmental stages; young gall is green, turns yellow and less pubescent when mature; ovoid in shape, 2 mm long and 1 mm broad, with a small curved appendix at the apex. Galls of this species were found in young thickened and curved shoots of Q. ilex. Distribution —• France (Poitiers, Cocnac, Saintes, Six-Fours and Aix en Provence), Spain (Bellaterra and Caldes de Malavella) and Andorra (Santa Coloma). Biology — Alternate asexual and sexual generations are known. The asexual generation induces bud galls on Q. ilex, galls develop during autumn; adults emerge in December-January. The sexual generation induces galls under the bark of twigs on Q. ilex, galls develop during April-May; adults emerge in May-June. If the gall is attacked by Synergus crassicornis Hartig then it becomes strongly deformed and lose the original outer shape; its size increases up to 1.0 cm in length and 0.6 cm in width, becomes lignified and less globose, the apex is also lignified.