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

long as scutellum. Anepisternum, preepisternum 2 and metepisternum lighter brown, metanotum and laterotergite as dark as mesoscutum. Antepronotum with several long setae, longest one 0.31 mm. No anepisternal setae. Wings light brownish, veins light brown, both membrane and veins evenly covered with macrotrichia. Costa produced beyond R

5 by a distance of 0.14 mm. Sc strong, H to Sc per Sc to R, distance of costa 59:83. R, ending in C at the level of base of M-fork. Cross-veins R-M and M-M in one line. M ratios: 51:114 and 51:91, Cu, ratio 70:66. M

3 thick to wing margin, Cu

2 distinct to level of M

3-Cu. A, well developed and setose, reaching wing margin. Calypter with several long setae along its margin, up to 0.23 mm. Haltères brown, but yellowish white in basal third. Legs yellow, covered with evenly set dark trichia and several setae. Male hind coxa in middle third with four black setae of 0.2 mm posterolaterally. All trochanters with a black spot ventrally. Femora laterally slightly compressed and thickened medially. Ratios of coxae to femora (without trochanter) and to tibia: 49:81:104; 49:85:118; 50:111:157. Mid tibia with two anterodorsal and three posterodorsal setae. Hind tibia with three long dorsal setae. All spurs on mid and hind tibiae subequal in length, hind ones 0.21 mm (measurements taken on holotype). Empodia very small. Abdomen dark brown, tergites and sternites covered with long dark setae. Male terminalia (Figs 1-2) 0.28 mm long. Gonocoxites not large, but seem robust (Fig. 1), meeting on a longer section ventrally. Gonostylus broad at base, horizontally medially curved, with high number of strong setae. The apex of gonostylus is comparatively thick, black and not bifid (Figs 1-2); gonostylus in broadest extension (largely in a caudal view, Fig. 2) subtriangular. Aedeagus rather simple, ventrally curved. Tergite 9 (Fig. 3) rather small (cf. bar), transverse, i.e. 2.85 times broader than long, with long thick setae on all its caudal 3/4. Female similar to male (female paratype with two lighter mesoscutal lines but they are probably due to its slightly teneral status), cerci ochre with brown apex. Fore leg with tarsomeres 2 to 4 hardly swollen, tarsomere 1 being far the thickest. All fore tarsus and mainly ventral half of mid tarsus covered with thick dense black setulae. Length ratio of fore tarsomeres 69:30:22:14:12. The ratio of length to the maximum width of the fore tarsomere 2 is 6.0 (in comparison, this ratio is ca. 3.5 in D. ferruginosci). Cx

3 with 7 long but less even setae. Etymology - The specific epithet "setistylus" (noun) refers to the armature of its male gonostylus. This is a peculiar species with its uniapical and strongly setose gonostylus and transverse male tergite 9, and female fore tarsomeres 2-4 not swollen. It is easily recognisable by its unicolorous (not striped) dark thoracic scutum. I think, there is