Scathophaga alashanica, Ozerov & Krivosheina, 2019

Ozerov, A. L. & Krivosheina, M. G., 2019, Two new species of the genus Scathophaga Meigen, 1803 (Diptera: Scathophagidae) from Asia, Russian Entomological Journal 28 (1), pp. 102-106 : 106

Scathophaga alashanica sp.n.

Figs 5–9 .

Holotype ♂, CHINA, “Дын- юань- ин, с. Алашань” [Alashan or Alxa, 38.8442°N 105.7050°E], 30.V.1908, Kozlov ( ZISP) . Paratypes 1 ♂♂, 2 ♀♀, the same geographical label as the holotype, 29 and 30. V .1908 ( ZISP, ZMUM) .

DESCRIPTION. Male, female. Length of body 5.1– 6.0 mm. Length of wing 5.4–6.1 mm.

Head. Frontal vitta yellow, matt; face and gena yellow, whitish dusted; fronto-orbital plate, ocellar triangle, and postcranium blackish, greyish dusted. Setae: 3 orbitals, 3–4 frontals, 1 ocellar, 1 postocellar, 1 inner vertical, 1 outer vertical; 1 pair of strong vibrissae and 2 pairs of subvibrissae present. Postcranium covered with white hairs. Antenna black; postpedicel about twice as long as wide; arista black, bare. Palpus yellow, filiform, without long apical seta.

Thorax. Completely black, dense pale grey dusted. Acrosticals not differentiated than the other hairs on scutum, 2 postpronotals, 2 notopleurals, 1+2 supra-alars, 1+2 intra-alars, 2 postalars, and 2+3 dorsocentrals. Proepisternum centrally and ventrally with whitish hairs, without strong setae ventrally. Proepimeron with whitish hairs. Anepisternum covered with hairs completely and with 3–4 strong setae along posterior margin. Katepisternum covered with hairs completely, with long whitish hairs posteriorly and one strong seta in posterodorsal corner. Postmetacoxal bridge absent. Scutellum greyish dusted, with a pair of strong basal scutellar and a pair of strong apical scutellar setae.

Legs. All coxae black, greyish dusted. All femora black, except 1/4 or 1/5 of yellow apex, greyish dusted. All tibiae and tarsi yellow. Fore femur with whitish hairs, longer ventrally, with 4–5 dorsal setae in apical third. Fore tibia with 3–4 posterodorsal in apical half, 2 dorsal, 1–2 posterior, 1 preapical anterodorsal, 1 apical posterodorsal, 1 apical posterior setae. Mid femur with a row of anterodorsal setae, with 1 preapical posterodorsal and 1 preapical posterior setae. Mid tibia with 1–2 anterodorsal, 1–2 posterodorsal, 1 ventral (strong in female) and 1 preapical dorsal setae, also with a ring of apicals. Hind femur with a row of dorsal/ anterodorsal setae. Hind tibia with 2–3 posterodorsal, 2–3 anterodorsal, 1 preapical dorsal, 1 preapical anterodorsal, and 1 apical anteroventral setae.

Wing clear, veins brownish. Vein R 1 bare. Calypteres, including margins, whitish or yellowish. Halter yellow.

Abdomen black, greyish dusted, covered with whitish hairs. Tergites 2–5 in male and tergiters 2–6 in female each with a row of marginal setae. Male sternite 4 almost twice as long as wide ( Fig. 5 ). Male sternite 5 with short lobes, with short conical projection medially between both lobes ( Fig. 8). Cerci and surstyli as in Figs 6, 7 . Aedeagus as in Fig. 9.

COMPARISON. The new species is similar to S. kaszabi (Šifner, 1975) and S. mihalyii (Šifner, 1975) by the structure of cerci and surstyli, but differs easily by the shape of aedeagus (compare Figs 9, 11, 13) and of male sternite 5 (compare Figs 8, 10, 12).

DISTRIBUTION. China (Inner Mongolia).

Acknowledgements. The work was conducted within the state project No AAAA-A16-116021660077-3. We are very grateful to Dr. Olga Ovchinnikova (ZISP) and Mrs. Galina Suleymanova (ZISP) for the loan of the material of Scathophaga for study.

Figures

Figs 5–7. Scathophaga alashanica sp.n., PT ♂: 5 — sternite 4; 6 — epandrium, cerci and surstyli, dorsal view; 7 — epandrium, cerci and surstyli, lateral view. Рис. 5–7. Scathophaga alashanica p.n., PT ♂: 5 — стернит 4; 6 — Эпандрий, церки и сурстили, сверху; 7 — Эпандрий, церки и сурстили, сбоку.