Spartimas apiciniger, Zhang, Ting-Ting & Yang, Ding, 2010

Zhang, Ting-Ting & Yang, Ding, 2010, Two new species of the genus Spartimas Enderlein from China (Diptera: Stratiomyidae), Zootaxa 2538, pp. 60-68 : 61-64

Spartimas apiciniger sp. nov.

( Figs. 2 , 5, 8, 10–13 )

Diagnosis. Scutellum with 6 yellow spines, lateral pair much smaller than others; pleura wholly yellow; apical 1/3 of hind femur brown; M3 absent; gonocoxal apodeme short, barely reaching beyond anterior margin of genital capsule; posteromedian portion of gonocoxites with an obtusely rounded process; dorsal bridge of gonocoxites with V-shaped anterior margin; phallic complex with two long lobes.

Description. Male. Body length 6.5 mm, wing length 5.0 mm.

Head ( Fig. 5) black, more or less shining metallic purple. Eye red brown and bare, contiguous on frons, upper facets conspicuously larger than lower ones. Ocellar tubercle large; ocelli brownish yellow. Hairs on head pale yellow, face along eye margin pale grey pollinose. Antenna yellow, but base of scape dark brown, flagellomeres 2–8 pale brown to dark brown; pale pilose, outer surface of scape and pedicel dark brown haired and tip of flagellomere 8 with 2–3 short hairs; first flagellomere as long as flagellomeres 2+3, flagellomeres 2–7 subequal in length, last flagellomere as long as flagellomeres 6+7; antennal ratio (as length ratio scape: pedicel: flagellum) 1.0: 0.9: 3.9. Proboscis yellow with pale yellow hairs. Palpus yellow except segment 1 being dark brown; hairs pale yellow. Head 1.2 times higher than long; eye width 0.9 times distance from anterior ocellus to antennal insertion, 3.4 times frons width just above antenna and 1.1 times face width at lowest point from direct view; frons width just above antenna 6.0 times that at anterior ocellus and 0.3 times face width at lowest point from direct frontal view; distance from anterior ocellus to antennal insertion 0.8-0.9 distance between antennal insertion to ridge-like posterior margin of mouth opening behind proboscis.

Thoracic pronotum, scutum and scutellum shining black, more or less shining metallic purple, pale grey pollinose; postpronotal callus pale brown and postalar callus yellow; scutellum with 6 yellow spines, of which lateral pair much smaller than others; pleura wholly yellow. Hairs on thorax pale yellow; anepisternum (except anterior and posterior parts), anepimeron and meron bare. Legs ( Fig. 8) yellow (fore leg missing), but apical 1/3 of hind femur brown, hind tibia (except basal part) dark brown, hind tarsomeres 1–2 pale yellow, mid and hind tarsomeres 3–5 brown. Hairs on legs pale yellow, but hind femur, tibia and tarsus with brown hairs, apical margin of hind tarsomeres 1–2 and tarsomeres 3–5 with black hairs. Wing ( Fig. 2 ) tinged with brown but basal part, cell r2+3 (except the part under stigma and posterior margin), apical half of cell bm and middle part of cell cua1 nearly hyaline; stigma and veins brown; evenly set with microtrichia except wing base (excluding alula), basal portion of cell cu p bare. Halter yellow.

Abdomen 5.0 times longer than wide, nearly parallel-sided; brownish yellow to brown, with brown short hairs being longer, erect and yellow on sides of dorsum; sternites 1–4 pale yellow with yellow hairs. Male genitalia ( Figs 10–13 ): Epandrium narrow with anterior margin deeply concave; dorsal bridge of gonocoxites with V-shaped anterior margin; posteromedian portion of gonocoxites with an obtusely rounded process; gonocoxal apodeme short; gonostylus wide, apical part obliquely truncate and bifurcate with dorsal lobe small and sharp; phallic complex with two lobes, thicker and longer than that in S. hainanensis sp. nov.

Female. Unknown.

Type material. Holotype male, CHINA: Guangxi, Leye, Huaping, 24°50'N; 106°12'E, 17. VII. 2004, Xingyue Liu.

Distribution. China (Guangxi).

Remarks. The new species is somewhat similar to S. ornatipes Enderlein , but it can be separated by the black apex of the hind femur, wholly yellow thoracic pleura, vein M3 absent, and the phallic complex with two slender lobes. In S. ornatipes , the hind femur has a wide, subapical brown ring; anepisternum is posteriorly largely blackish (except the upper border), the anterodorsal part of the anepimeron and meron are blackish; vein M3 is present; phallic complex has three wide lobes ( Yang & Nagatomi 1992). It is more similar to S. hainanensis sp. nov., but in S. hainanensis sp. nov., the subapical portion of hind femur with a narrow yellowish brown ring which is not connected on ventral surface; posteromedian portion of the gonocoxites has an obtusely flattened process; dorsal bridge of the gonocoxites has the straight anterior margin; phallic complex is much slender and shorter than in S. apiciniger sp. nov.

Etymology. The specific name refers to the black apical part of the hind femur.

Figures

FIGURES 1 – 3. Wings. 1, Spartimas ornatipes Enderlein, male. 2, Spartimas apiciniger sp. nov., male. 3, Spartimas hainanensis sp. nov., male.

FIGURES 10 – 13. Spartimas apiciniger sp. nov., male. 10, tergites 9 – 10 and cercus, dorsal view. 11, tergites 9 – 10 and cercus, ventral view. 12, genital capsule, dorsal view. 13, genital capsule, ventral view.