Cheilosia herculana Brădescu

Stahls, Gunilla & Barkalov, Anatolij V., 2017, Taxonomic review of the Palaearctic species of the Cheilosiacaerulescens-group (Diptera, Syrphidae), ZooKeys 662, pp. 137-171 : 149

Cheilosia herculana Brădescu Fig. 7

Cheilosia herculana Brădescu, 1982: 13.

Nigrocheilosia herculana : Vujić 1996: 56.

Type locality.

"Roumaine, Carpates Meridionales, Monts Mehedinti, Baile Herculane, Vallee du ruisseau Feregari" [Herculane, Romania].

Type material studied.

Holotype, male, in MGAB [not available for study]. Paratypes, a male and a female. Paratypes are labelled: 'Romania, Baile Herculane, 5.IX.1980, leg. VL Brădescu’, in coll. Claussen.

Description.

♂: Face in frontal view slightly divergent from level of antennal insertion to lower mouth edge, shining, with very weak stripe of pollinosity, lower part somewhat protruded (Fig. 7A). Parafacia rather narrow, approximately 1/2 the width of basoflagellomere, shining, with slight pollinosity on upper part. Frons slightly swollen, shining, with white and posteriorly some black, pile. Frontal angle ≈ 90°. Lunula black. Antennal pits confluent. Vertical triangle with black and a few yellow pile. Eye-contiguity slightly shorter than length of frons without lunula. Basoflagellomere small, pale-brown to dark-brown, arista rather long, with short pile (Fig. 7B). Scutum shining, rather coarsely punctated, all covered with whitish pile of even length, also on scutellum. Scutellum margin without stronger bristles. Anepisternum and katepisternum partly shining, with white long pile. Katepisternum with dorsal and ventral pile patches broadly divided posteriorly and narrowly connected anteriorly. Halter brownish. Wing with all cross-veins infuscated. Cell bm and cell cup of wing with obvious bare areas (Fig. 7H). R4 + 5 of wing not distinctly curved. Postalar callus without black bristles. Legs with distal part of femora and apical 1/3-1/2 and distal 1/6 of tibiae yellowish, tarsi yellow to yellowish brown, pile mainly white. Mesofemur posteriorly with long yellow pile. Metafemur ventrally with short black (rather strong) pile, distally dorsally with yellow pile, its anterior surface with long yellow pile. Abdomen shining, with pollinosity on medial anterior 2/3 of tergite II, and on medial anterior 1/3 of tergite III. Abdomen with white erect pile, longer on the sides and shorter medially. Hypopygium Fig. 7 E–F.

♀: Face and parafacia as in the male. Frons shining, coarsely punctated, with white erect pile, and mixed with black erect pile on posterior part. Frontal furrows moderate (Fig. 7D). Lunula dark-brown. Basoflagellomere yellowish brown. Scutum shining, with white pile of even length. Otherwise as the male.

Size. Body length 10-11 mm.

Additional material studied.

No additional material available.

Distribution.

Romania, Montenegro, FYR Macedonia.