S. Mahunka szerk.: Folia Entomologica Hungarica 60. (Budapest, 1999)

works of W. Wagner 1947, 1968; Ribaut 1952; Ossiannilsson 1983). These studies revealed the fact that the material examined contains two distinct, sympatric species, one of them is R. vitripennis while the other one represents a new, undescribed taxon. An additional specimen of this species was found later in the collection of Gy. Győrffy, collected in the Kiskunság N. R, the central part of the Hungarian Great Plain. Figs 4-10. Tachycixius soosi sp. n. 4: aedeagus, right side, lateral view; 5: aedeagus, ventral view; 6: aedeagus, left side, lateral view (scale bar = 200 pm); 7: stylus, inner side, dorsal view (scale bar = 100 pm); 8-10: anal tube, 8: ventral view; 9: lateral view; 10: dorsal view. Measures: Figs 8-9: scale bar = 250 urn, Fig. 10: scale bar = 200 urn)