Two new species of Sweltsa (Plecoptera: Chloroperlidae) from China Author Li, Wenliang 0000-0001-9019-1223 College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, Henan 471023, China. & wenliangli @ haust. edu. cn; https: // orcid. org / 0000 - 0001 - 9019 - 1223 wenliangli@haust.edu.cn Author Wang, Yingying 0000-0002-7009-7413 College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, Henan 471023, China. & wyy 5657 @ 163. com; https: // orcid. org / 0000 - 0002 - 7009 - 7413 Author Li, Weihai 0000-0003-2803-4416 Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Xinxiang, Henan 453003, China. & lwh 7969 @ 163. com; https: // orcid. org / 0000 - 0003 - 2803 - 4416 Author Li, Mengyu 0000-0002-7950-4142 Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Xinxiang, Henan 453003, China. & 2433797846 @ qq. com; https: // orcid. org / 0000 - 0002 - 7950 - 4142 2433797846@qq.com text Zootaxa 2021 2021-10-20 5057 1 145 150 journal article 3970 10.11646/zootaxa.5057.1.10 6d7bc4cf-15f5-4b7a-bc4e-4c2cec0235fe 1175-5326 5585504 B0B3FB4A-85D5-43F9-9630-E7537A437C7F Sweltsa zhejiangensis Li, W.H. & Wang , sp. nov. ( Figs. 1b, 1f–1h & 3 ) Adult habitus ( Figs. 1b, 1f ). 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 ). 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 ). 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 & 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 ). Sternum 9 with a tongueshaped subgenital plate ( Fig. 3e ). 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 , 3a–3d ). Female ( Figs. 3f– 3g ). 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 . Paratypes : 1 female ( HIST ), same data and date as holotype ; 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 . 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 ).