Hybos fujianensis, 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 fujianensis sp. nov.

Fig. 12

Type material examined.

Holotype: China •♂; Fujian, Wuyishan, Dingweizhan; 600 m, 10 July 2009; Xiaoyan Liu; CAU. Paratype: China • 1♂, same as holotype; CAU.

Diagnosis.

First flagellomere with two blackish dorsal hairs; arista bare. Legs mostly dark brown to blackish brown. Hind tibia apically with long thin pd. R4+5 and M1 parallel apically. Abdomen short thick.

Description.

Male. Body length 3.5-4.1 mm. Wing length 4.1-4.3 mm.

Head black with gray pilosity. Eyes contiguous on frons, brownish yellow with slightly enlarged dorsal facets dark yellow. Hairs and bristles on head blackish except postero-ventral surface with partly dark brown hairs; ocellar tubercle distinct with two rather long oc and without posterior hairs. Antenna blackish; scape without hairs, pedicel with circlet of blackish subapical hairs; first flagellomere dark brown, not elongated, nearly as long as scape and pedicel combined, with two blackish dorsal hairs; arista brown, very long and bare except apical ~ 1/4 thin. Proboscis slightly shorter than head, dark brown. Palpus dark brown, with five or six dark brown ventral hairs.

Thorax black with gray pilosity. Hairs on thorax blackish, bristles black; hairs on mesonotum short, ppn absent, two npl (anterior npl rather short, ~ 1/2 as long as posterior one), uniserial hair-like dc nearly as long as irregularly hexaserial acr, two long prsc, one short psa; scutellum with six marginal hairs (~ 1/3 as long as sc) and two long sc. Legs mostly dark brown to blackish brown except all coxae, hind femur blackish and hind knee dark yellow. Hairs on legs mostly dark brown to blackish and partly brown, bristles blackish to black, but those on coxae blackish; hind tibia with partly brown hairs and hind tarsus with brownish yellow ventral hairs. Fore femur 1.2 × and hind femur 2.2 × as wide as mid femur. Fore femur with one row of weak pv nearly as long as femur thickness. Mid femur with 6-7 strong ad on basal 2/3, one row of pv (middle pv rather long, longer than femur thickness). Hind femur with two ad on apical 2/5, four or five weak pd on basal 1/2 and ~ 3 rows of spine-like ventral bristles on tubercles mostly short except eight long av including four middle av rather long. Fore tibia with one row of short and long ad and some long thin pv hairs on apical 1/2; apically with four bristles including one very long ad and one very long thin pv. Mid tibia with three ad (2 basal ad very long) and two very long av at middle; apically with five bristles including one very long av. Hind tibia apically with long thin pd. Fore tarsomere 1 with two strong pv at extreme base and two very long thin pv hairs at middle. Mid tarsomere 1 with one very long strong av at extreme base. Hind tarsomere 1 with four short spine-like av. Wing hyaline, stigma brownish; veins brownish yellow to brown, R4+5 and M1 parallel apically. Squama dark yellow with dark yellow hairs. Halter dark yellow with pale yellow knob.

Abdomen short thick with thickened apex including hypopygium slightly thickened, apically distinctly curved downward, dark brown with gray pilosity except basal four segments brown. Hairs and bristles on abdomen brownish yellow or brown except those on hypopygium dark brown.

Male genitalia. Left epandrial lamella slightly narrower than right epandrial lamella (Fig. 12b ); left surstylus relatively narrow, obliquely truncate apically and with one finger-like outer process (Fig. 12d ). Right epandrial lamella apically distinctly incised at inner margin; right surstylus rather wide, apically with one inner process directed inward and two or three short spine-like bristles on small outer process (Fig. 12c ). Hypandrium ~ 2.0 × longer than wide, basally rather wide, apically distinctly tapered (Fig. 12e ).

Female. Unknown.

Etymology.

This specific name refers to the type locality Fujian.

Distribution.

China (Fujian).

Remarks.

The new species is similar to H. xishuangbannaensis Yang & Yang from Yunnan, but may be separated from the latter by the mid tibia with three ad and two very long av at middle and right surstylus with 2-3 short spine-like bristles on the small outer process. In H. xishuangbannaensis , the mid tibia has two very long dorsal bristles on basal 1/2, and the right surstylus does not have the short spine-like bristles ( Yang and Yang 2004).

Figures

Figure 12. Hybos fujianensis sp. nov. a male habitus, lateral view b genitalia, dorsal view c right surstylus d left surstylus e hypandrium, ventral view.