Tumeochrysa (Nineta) vittata Wu & Liu 2024, comb. nov.

[32] Tumeochrysa (Nineta) vittata (Wesmael, 1841) comb. nov. (Figs 39, 83) Chrysopa vittata Wesmael, 1841: 211. Type locality: Belgium [circa Bruxellas]. Syntype in IRSN. Hemerobius proximus Rambur, 1842: 425. Type locality: France. Syntype in OUM. Chrysopa integra Hagen, 1852: 40. Type locality unknown. Type depository unknown. Nothochrysa olivacea Gerstaecker, 1893 [1894]: 166. Type locality: Japan (Yokohama). Holotype in EMAU. Chrysopa inornata Matsumura, 1911: 14. Type locality: Russia (Sakhalin). Holotype in EIHU. Nineta vittata: Navás, 1912: 99. Chrysopa inornatella: Nakahara, 1914: 399. Chrysopa matsumurae Navás, 1915b: 473. Diagnosis. This species is characterized by the presence of the head and thorax without spots, the pale brown outer gradate series of fore- and hindwings, the male sternum IX obviously elongated and curved dorsal apically, the gonarcus with small U-shaped invagination, and the broad female subgenitale. Description. Male. Body length 15.1–16.4 mm, forewing length 17.1–21.0 mm, hindwing length 16.5–18.8 mm. Head without spots, vertex raised. Compound eyes prominent and black. Antennae yellow, scape broad, pedicel wider than flagellum. Frons, clypeus and gena without spots. Maxillary palpi with brown stripe on outer side, labial palpi brownish yellow. Pronotum short and wide, sometimes with small reddish spots on anterolateral angle. Mesonotum and metanotum without markings. Legs with dense setae and without spots. Pretarsal claws brown, with basal dilation. Forewing broad, without shadings. Pterostigma indistinct. Costal area with 28–36 crossveins; 18–25 radial crossveins present. m1 smaller than m2; im ovoid; 11–13 psm-psc crossveins present. c1 smaller than c2, dcc opened. A1 forked, A2 and A3 simple. Inner gradate series with 11–16 crossveins; outer gradate series with 13–15 brown crossveins. Hindwing slightly narrow. Pterostigma indistinct. Costal area with 25–28 crossveins; 18–22 radial crossveins and 11 psm-psc crossveins present. Inner gradate series with 9–15 crossveins, outer gradate series with 11–14 crossveins. Abdomen with dense setae. Tergum VII and sternum VII subquadrate in lateral view; tergum VIII and sternum VIII about 1/3 as long as tergum VII; sternum IX obviously elongated and curved towards dorsal apically; tergum IX fused with ectoproct; ectoproct rounded. Callus cerci ovoid. Gonarcus arcuate, median arch with small U-shaped invagination, lateral arms flat and expanded; entoprocessus broad; arcessus wide at base and curved. Female. Body length 14.1–16.0 mm, forewing length 18.5–22.0 mm, hindwing length 17.4–19.0 mm. Sternum VII slightly longer than tergum VII; tergum VIII obviously shorter than tergum VII; tergum IX fused with ectoproct. Callus cerci ovoid. Subgenitale broad, bilobed apically slightly; spermatheca thin, vela short, ventral impression absent, duct long and coiled. Material. 2♂, China, Hebei, Chengde, Xinglong, 975 m, 2018.VI.01, Jinlong Ren (CAU); 3♀, China, Liaoning, Dandong, Kuandian, Baipuxia, 600 m, 2022.VII.31, Xingyue Liu (CAU); 1♀, China, Jilin, Yanbian, Songjiang, 2015.VIII.07, Tingting Zhang (CAU); 1♂, China, Heilongjiang, Jiamusi, Fuyuan, Wusu, 2022.VII.15–16, Xueyuan Wang (CAU); 1♂ 2♀, China, Heilongjiang, Yichun, Daqingshan, Liangshui National Nature Reserve, 320–400 m, 2022.VII.21–22, Yuchen Zheng (CAU); 1♀, China, Heilongjiang, Tongjiang, Jiejinkou, Hezhezu, Jiangshengtun, 116 m, 2022.VII.18, Xueyuan Wang (CAU); 1♂ 1♀, China, Heilongjiang, Yichun, Fenglin, Wuying, Fenglin National Nature Reserve, 288 m, 2022.VII.19, Xueyuan Wang (CAU); 2♂ 1♀, Japan, Hokkaido, Kamish, Tokachi-Mitsumata, 690–730 m, 2013.VII.29, Xingyue Liu (CAU); 1♀, Japan, Honshu, Nagano, 1000 m, 2015.VII.14, Hui Dong (CAU); 2♂ 2♀, Japan, Honshu, Nagano, 1655–1865 m, 2015.VII.13, Xingyue Liu (CAU). Distribution. China (Hebei, Heilongjiang, Jilin, Liaoning); widespread in the Palearctic region. Remarks. This species can be distinguished by its broad scape, the elongated male sternum IX, and the broad female subgenitale. As all species of Nineta in China have similar external morphological characters, some earlier records of this species in China may be misidentifications of other congeneric species.