12. Euhybus yunnanensis sp. nov.

(Fig. 5)

Diagnosis. Legs mostly blackish brown except tip of fore and mid femora, all tibiae and tarsomeres 3–5 brown; all tarsomeres 1–2 dark yellow.

Description. Male (Fig. 5a). Body length 3.5–3.6 mm, wing length 3.1–3.2 mm.

Head black with pale gray pollinosity. Eyes blackish brown with slightly enlarged upper facets. Setae and setulae on head black; ocellar tubercle indistinct, with 2 short anterior oc and 2 short posterior setulae. Antenna blackish; first flagellomere slightly longer than scape + pedicel, 2.5 times longer than wide, without dorsal setae; arista 2.9 to 3.5 times as long as first flagellomere, dark brown, bare except apical 1/3 or so thin. Proboscis dark brown, distinctly shorter than head, thickened, nearly obtuse apically; palpus dark brown with 1 long seta at extreme tip.

Thorax black with pale gray pollinosity except mesoscutum shiny with wide posterior portion pollinose. Setae and setulae on thorax black; h absent, 2 npl, setula-like acr biriseriate, setula-like dc uniseriate, 1 psa, scutellum with 6 marginal setulae and 2 long sc. Legs mostly blackish brown to blackish except tip of fore and mid femora, all tibiae and tarsomeres 3–5 brownish yellow to brown; all tarsomeres 1–2 dark yellow. Setae and setulae on legs dark brown to black. Fore femur nearly as thick as mid femur; hind femur 1.7 times as thick as mid femur, with row of long thin pv. Mid femur with row of weak pv. Hind femur with 1 short thick ad near apex, about 2 rows of pv spines and row of short outer pv on basal 1/3. Fore tibia apically with 1 slightly long thin pv. Mid tibia apically with 1 long pv. Hind tibia apically with 1 setula-like pd. Fore and mid tarsomere 1 with some long setulae. Hind tarsomere 1 with row of spine-like ventral setae and 1 spine-like av near apex. Wing infuscate; costal vein with longer setae on basal 2/3; blackish brown pterostigma short and rounded (about 1/6 as long as cell r 1, not filling apex of cell r 1); veins dark brown to blackish brown. Squama dark brown with brown setulae. Halter blackish brown.

Abdomen shiny blackish with thin gray pollinosity, sternites 1–6 weakly sclerotized; hypopygium slightly swollen. Mostly dark brown to blackish setae and setulae on abdomen, except sternites with nearly entirely dark yellow setae and setulae. Male genitalia: Lepn slightly narrower than repn, nearly truncate (Fig. 5b); lsur wide, trifurcated, with one very wide process, one slightly long square-shaped median process and one irregular process in lateral view (Fig. 5d). Repn with distinctly incised inner margin; rsur bifurcated, with 1 wide process bearing very long spine-like setae in lateral view (Fig. 5c). Hypandrium 1.8 times longer than wide, with subtriangular apical process; right lateral margin with weak apical incision (Fig. 5g).

Female. Unknown.

Type material. HOLOTYPE ♂, Yunnan, Yanjin, Xiaocaoba [27°56'56.14"N, 104°16'16.66"E, 1716 m], 18.VII.2022, Ding Yang (CAU) . PARATYPE: Yunnan, Yanjin, Xiaocaoba [27°93'57"N, 104°27'77"E, 1761 m], 17.VII.2023, Sihan Li (1 ♂, CAU) .

Distribution. China (Yunnan).

Remarks. The new species is similar to E. qinlingensis from Shaanxi, but may be separated from the latter by all the tibiae brown, hind tarsomere 2 dark yellow, and rsur with one process bearing very long, spine-like setae. In E. sinensis, the tibiae are black except the mid tibia dark yellow, the hind tarsomere 2 is blackish, and the rsur has one process with marginal denticles (Liu et al. 2014).

Etymology. The specific name refers to the type locality Yunnan.