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

Comparing the external morphological features of Rh. brachyanus with those of Rh. vitripennis, the length of the anal tube of the new species is much shorter, about onethird of that of Rh. vitripennis, the upper part of the pygofer is arcuate, rounded at the origin of anal tube while that of Rh. vitripennis has deep, V-shaped incision (compare Figs 24-25). Lateral and apical parts of the pygofer bear long macrosetae in case of the new species, covering the ventral side of the anal tube; the pygofer lobe is rounded, without appendix, the last quarter of its apical part has a membranous lobe, being significantly narrower than that of Rh. vitripennis (compare Figs 26-27). Figs 15-23. Abdomen and male genitalia of Rhopalopyx spp. Rhopalopyx brachyanus sp.n.: 15: abdomen, lateral view (scale bar = 200 pm); 17: stylus, dorsal view; 19: genital plate, inner side, dorsal view; 22: aedeagus, lateral view; 23: aedeagus, dorsal view. Rhopalopyx vitripennis: 16: stylus, dorsal view; 18: genital plate, inner side, dorsal view; 20: aedeagus, lateral view; 21 : aedeagus, dorsal view. Measures: Figs 16-17: scale bar = 200 urn, Figs 18-19: scale bar = 250 pm, Figs 20-23: scale bar= 100 um