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

Material examined — Holotype: male, "KMNP. Csanádi puszták.Csikóspuszta, löszgyep/3. 1997. 09.17-18." Paratypes: 3 males, "KMNP. Csanádi puszták. Csikóspuszta, löszgyep/2, löszgyep/3, 1997. 09.17-18."; 1 male, "KNP. Bugacpuszta. 1981.10.09. leg. Gy. Győrffy." The type material is deposited in the Hungarian Natural History Museum, Budapest (HNHM). Description — Holotype: body length: 3.775 mm, fore wing length 3 mm, fore wing width 0.8 mm. Paratypes: body length 3.5-3.675 mm, fore wing length 2.76-2.9 mm, fore wing width 0.78-0.84 mm. Figs 11-14. Tachycixius soosi sp. n. 11, 13, 14: aedeagi of paratypes from ventro-lateral and ventral views (scale bar = 198 pm); 12: apical part of aedeagus in larger magnification (scale bar = 75.6 pm) External morphology (Figs 15, compare Figs 24-27): Basic colouration pale ochreous brown, pattern of body and fore wings matching with that of its closely related species, Rh. vitripennis. Frons with brownish pattern consisting of horizontal, parallel stripes running slightly obliquely laterad, interrupted medially by ochreous line. Vertex light brownish ochreous, in some cases with darker brown, parallel medial lines continuing towards inner margin of fore wing clavus. Pronotum and scutum with pale ochreous markings, latter with two symmetrical, whitish spots. Fore wing transparent, with dark brown zone between veins M and Cu extending towards apex of wing. First abdominal segments with dark ventral markings, this pattern becaming much paler towards caudal end of abdomen; dorsal surface blackish brown from basal abdominal segments to tip of anal tube. Lateral and ventral surfaces of valve, genital plates and pygofer pale ochreous brown.