S. Mahunka szerk.: Folia Entomologica Hungarica 64. (Budapest, 2003)

eral parts of propodeum outside central area strongly pubescent (Fig. 8). Metascutellum and metanotal trough uniformly coriaceous, last with dense white setae; ventral impressed rim of metanotum completely smooth and glabrous, without wrinkles (Fig. 8). Wing hyaline; fore wing margin with short, scattered cilia, indistinct prolong radial cell margin, which 3.5-4.5 times as long as broad; 2nd abscissa of Rs curved; R, reach to half distance from wing margin; areolet large, usually distinct (Fig. 66). Foretarsomeres 1 to 5 ratio - 1.0:0.38:0.2:0.2:0.38; fore tibia+tarsus and fore leg claw on Figs 67-68. Metasoma slightly shorter than head+mesosoma; all tergites with dense lateral band of white setae; tergite two occupies 0.5-0.75 of metasoma in dorsal view, without distinct punctures posteriorly; subsequent tergites with dense micropunctures. Ventral spine of hypopygium slender, prominent part 3.5-4.5 times as long as broad, with sparse short setae. Gall. Spherical, somehow similar to A. kollari, but of smaller sizes and more lignified, on buds of Quercus robur, Q. petraea, Q. pubescens, Q. frainetto, Q. virgiliana, Q. macranthera and Q. hartwissiana. A detailed description of the galls is given in Hartig (1840, 1843), Mayr (1870), Kieffer (1897-1901), Dalla Torre & Kieffer (1910), Riedel (1910), Houard (1908), Tavares (1930), Ambrus (1974), Quinlan (1974), Csóka (1997), and many others. Diagnosis - This species belongs to the group of species composed of: A. kollari/A. hispanicus, A. caliciformis, and A. sternlichti/A. infectorius, within the kollari-group, with propodeal lateral carinae bent outwards in the middle part. The scutellum is strongly rugose, scutellar foveae clearly delimited posteriorly and the bottom of foveae are smooth, without pubescence (Fig. 13). Differs from A. infectoriuslA. sternlichti by the gena less broadened behind the compound eye (Fig. 63), notauli are complete, uniformly deep and reach the pronotum, and also the body is of smaller size and less robust. See also the species key. The gall is spherical, like in A. kollari/A. hispanicus, but of smaller size, much hardly lignified and the surface is interrupted by cracks. The gall is Andricus infectorius is even harder than that of A. lignicolus and does not present this characteristic surface and usually with nipple-like protuberances. Differs from A. caliciformis, A. kollarilA. hispanicus by scutellar foveae, which are deep, widely separated, clearly delimited and are not hidden by pubescence (Fig. 13), while in the other three mentioned species scutellar foveae are not so widely separated, not clearly delimited and hidden by pubescence (Fig. 14). Ventro-lateral edge of pronotum in A. lignicolus is rugose (Fig. 65), while coriaceous in the other 3 species (Figs 35, 59), and finally the acetabular carina is stronger in A. lignicolus (Figs 35, 59, 65). For other characters see also the key to species.