Nyctellisca chureisica, Verves & Khrokalo, 2019

Verves, Yuri G. & Khrokalo, Liudmyla A., 2019, Key to species of the genus Nyctellisca nom. nov. with description of Nyctellisca chureisica n. sp. (Diptera: Sarcophagidae: Miltogramminae), Israel Journal of Entomology 49 (1), pp. 137-142 : 140

Nyctellisca chureisica n. sp.

LSID: urn:lsid:zoobank.org:act:8A9304C4-046A-47E8-93CE-1FE48C8EAB74 .

Etymology: The species is named for the type locality, Chureis.

Diagnosis: This species is close to N. egregia ( Zimin, 1928) in having an obtuse-angled M vein without appendix and one horizontal row of 4–5 kepst, but can be easily distinguished from the latter species by the presence of only 2 pairs of proclinate orb, almost straight dm–cu and an entirely yellow arista.

Description: Female. Body length 2.7 mm.

Head. Frons, facials and parafacials silvery yellow dusted, genae and occiput slightly light grey pruinose, antennae, arista and palpi yellow. Parafrontalia, parafacialia and genae with microscopic light setae, fine yellowish white haired, almost bare; 2 pairs of strong angular vi present; gn numerous, medium long and hair-like. Frontal width at vertex and at level of antennal base about 0.4× of head width. Frontal vitta in middle of frons 0.5× as wide as parafrontalia, in upper part 3.0× widened backwards. Flagellomere 1.3× as long as pedicel, arista thickened in basal 0.6–0.7. Vibrissal angles higher than oral margin, lunula distinctly narrowed downwards. Parafacial wide at level of antennal base equals 0.25× of eye height, and genae 0.13× as high as eye. Palpi medium long, distinctly widened at apex; prementum short and thick, 2.5× as long as wide. All head bristles whitish yellow, distinctly thickened. One regular row of pocl in upper part of occiput only; ivt distinctly longer than ovt; poc long and strong; orb 1+2, strong; fr 7–8, as long as orb, not crossed.

Thorax. Intensely dark grey dusted, almost black; scutum and pleura reddish, dorsally with several irregular rows of thickened elongate bristle-liked white setae, propleuron bare; prescutellar pairs of acr, dc, ial longer then postscutellars; npl 2, notopleural surface bare; kepst 4–5, forming one horizontal row along upper edge of katepisternum. Scutellum with 2 pairs of ms and several d. Legs. Entirely yellow, all tibia partly grey dusted. First tarsomere of fore tarsus flattened dorsoventrally and widened. Wings. Hyaline; veins, basicosta and epaulet yellow. Costal spine absent; all veins bare; r 2+3 closed at wing margin; r 4+5 long petiolate; M obtuse-angled, without appendix, connected with vein R 4+5 obliquely; dm–cu not curved, almost straight; ratio of 3 rd and 4 th sections of C 0.30:1.

Abdomen. Almost orange-yellow, rear parts of tergites slightly light brownish. All tergites with thick and long white marginal setae.

Male. Unknown.

Holotype: ♀ Saudi Arabia: Chureis [Khurais, 25°05'N 48°02'E], 3–4.vi.1976, W. Büttiker ( NHMUK).