Sweltsa zhejiangensis Li, W.H. & Wang, 2021

Sweltsa zhejiangensis Li, W.H. & Wang View in CoL , sp. nov.

( Figs. 1b, 1f–1h View FIGURE 1 & 3 View FIGURE 3 )

Adult habitus ( Figs. 1b, 1f View FIGURE 1 ). Body generally pale in ethanol. Head pale, with a median brown marking covering ocellar area to frons, posteromedial area of the spot rectangular; head about as wide as pronotum. Compound eyes black, ocelli with dark rings; antennae pale brownish, basal segments pale ( Fig. 1b View FIGURE 1 ). Pronotum with wide, brown median stripe and rugosities, pale lateral margins narrow. Wing membrane transparent; legs pale. Abdominal terga 1–7 with a wide pale brown median stripe ( Fig. 1f View FIGURE 1 ). Cerci 9-segmented. Setae of dorsal surfaces and lateral margins of segments 1–4 are of subequal length, and longer than the length of each segment; distal setae of segments 5–9 longer than the basal setae of every segment.

Male ( Figs. 1f–1h View FIGURE 1 & 3 View FIGURE 3 ). Forewing length ca. 7.7–8.4 mm; hindwing length ca. 6.6–6.9 mm. Tergum 8 with a brown anteromedial marking. Tergum 9 with band like transverse ridge ( Fig. 1f View FIGURE 1 ). Sternum 9 with a tongueshaped subgenital plate ( Fig. 3e View FIGURE 3 ). Epiproct widened toward triangular apex in dorsal aspect; epiproct recurved, distal portion distinctly swollen, with a keel that is widest subterminally and ending in a blunt tip, and dorsal surface nearly straight for entire length, ventral surface of apex rounded in lateral aspect ( Figs. 1g –1h View FIGURE 1 , 3a–3d View FIGURE 3 ).

Female ( Figs. 3f– 3g View FIGURE 3 ). Subgenital plate on sternum 8 extends over half sternum, and emarginate in ventral view.

Type Material. Holotype: male ( CAU), CHINA: Zhejiang Province, Longquan City, Fengyangshan , N 27°53.52’, E 119°9.95’, 1450 m, malaise trap, 2007.VII.6, Yajun Zhu GoogleMaps . Paratypes: 1 female ( HIST), same data and date as holotype GoogleMaps ; 2 males ( HIST), China: Zhejiang Province, Longquan City, Fengyangshan , Longquan Grand Canyon , N 27°53.52’, E 119°9.95’, 1450 m, 2021.IV.29, Xulong Chen GoogleMaps .

Etymology. The specific name refers to the Zhejiang Province where the type locality was located.

Distribution. China ( Zhejiang Province).

Remarks. Sweltsa zhejiangensis sp. nov. is similar to Sweltsa bilobata Mo, Ye, Wang & Li, 2020 in lateral epiproct and female subgenital plate shape. However, S. zhejiangensis can be easily distinguished from S. bilobata by the following features: the epiproct is gradually widened from base to subapical part in dorsal view; female subgenital plate extends over half the length of sternum 9. In S. bilobata , the epiproct is slightly constricted at median length and tapers evenly to the tip in dorsal view; the female subgenital plate nearly reaches the posterior margin of sternum 9 (figs. 2–6 in Mo et al. 2020).