Hybos leucopogus, Li & Yang, 2023

Li, Meilin & Yang, Ding, 2023, New species and records of the genus Hybos Meigen (Diptera, Empidoidea, Hybotinae) from Wuyishan National Park, China, ZooKeys 1172, pp. 313-351 : 313

Hybos leucopogus sp. nov.

Fig. 16

Type material examined.

Holotype: China • ♂; Fujian, Wuyishan, Yangludaoban; 890 m, 7-25 May 2021; Junli Yao (Malaise trap); CAU.

Diagnosis.

Legs entirely black. Hind femur distinctly thickened. Hind tibia with one row of ad hairs and four pd hairs on basal ½. R2+3 weakly curved, R4+5 and M1 weakly convergent apically. Hypandrium narrow basally, bifurcated apically.

Description.

Male. Body length 5.7 mm, wing length 5.4 mm.

Head black with gray pilosity. Eyes contiguous on frons, dark brown with slightly enlarged dorsal facets brownish. Hairs and bristles on head blackish except postero-ventral surface with partly brown hairs; ocellar tubercle indistinct with two oc and with two short posterior hairs. Antenna blackish; scape without hairs, pedicel with circlet of blackish subapical hairs. Proboscis slightly longer than head, dark brown. Palpus blackish brown, with three blackish brown ventral hairs.

Thorax black with gray pilosity. Hairs on thorax blackish, bristles black; hairs on mesonotum rather short, ppn absent, two npl (anterior npl short), uniserial hair-like dc nearly as long as irregularly quadriserial acr, one long prsc, one slightly long psa; scutellum with eight marginal hairs (4 hairs located between sc) and two long sc. Legs entirely black. Hairs on legs dark brown to blackish, bristles blackish to black, but those on coxae brown to dark brown; hind tibia with partly brown apical hairs. Fore femur 1.4 × and hind femur 2.3 × as wide as mid femur. Fore femur with one row of pv, as long as femur thickness. Mid femur with one row of long av and pv hairs (much longer than femur thickness). Hind femur distinctly thickened, 2.6 × as wide as hind tibia, with three long strong ad on apical ½, ~ 3 rows of ventral bristles (av long strong, short spine-like mv on distinct tubercles, pv on basal ½ and very long bristle-like outer pv hairs on apical 1/3. Fore tibia with some long pv hairs at middle; apically with four bristles including one very long strong ad. Mid tibia with one very long ad and three av hairs at middle (of which one long strong); apically with five bristles including one very long av and one long pv. Hind tibia with one row of ad hairs and four pd hairs on basal ½. Fore tarsomere 1 with some long to very long hairs. Mid tarsomere 1 with one av at extreme base and two long ad hairs. Hind tarsomere 1 with two short spine-like av, tarsomeres 1 and 2 with one row of short spine-like ventral bristles. Wing hyaline, stigma brown; veins brown to dark brown, R2+3 weakly curved, R4+5 and M1 weakly convergent apically. Squama dark yellow with dark yellow hairs. Halter dark yellow with pale yellow knob.

Abdomen apically weakly curved downward, black with gray pilosity; hairs and bristles brownish yellow and dark brown except those on hypopygium black. Hypopygium distinctly thicker than pregenital segments.

Male genitalia. Left epandrial lamella wider than right epandrial lamella (Fig. 16b ); left surstylus very wide, narrow apically, inner margin with one small, curved process bearing long hairs in lateral view (Fig. 16d ). Right epandrial lamella with concave inner margin near apex; right surstylus slightly narrow, apical margin with incision at middle, with one small trapezoid outer process and one small subtriangular inner process (Fig. 16c ). Hypandrium ~ 1.7 × longer than wide, rather narrow basally, bifurcated apically, with one straight and thick process (which has the truncate apical margin weakly serrate) and one long curved process (which is somewhat narrow medially and much widened apically) (Fig. 16e ).

Female. Unknown.

Etymology.

This specific name refers to all tibiae, and fore and mid tarsi with some hairs.

Distribution.

China (Fujian).

Remarks.

The new species is similar to H. modificatus sp. nov., but may be separated from the latter by the hind tibia straight and hypandrium bifurcated apically. In H. modificatus sp. nov., the hind tibia is slightly curved basally, and the hypandrium is not furcated.

Figures

Figure 16. Hybos leucopogus sp. nov. a male habitus, lateral view b genitalia, dorsal view c right surstylus d left surstylus e hypandrium, ventral view.