Description of three new Chinese species of the genus Mesonemoura (Plecoptera: Nemouridae) Author Du, Yu-Zhou School of Horticulture and Plant Protection and Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China Author Ji, Xiao-Yu School of Horticulture and Plant Protection and Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China Author Wang, Zhi-Jie School of Horticulture and Plant Protection and Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China & Department of Horticulture, Suqian College, Suqian 223800, China text Florida Entomologist 2015 2015-03-31 98 1 130 130 http://www.bioone.org/doi/10.1653/024.098.0122 journal article 10.1653/024.098.0122 1938-5102 12769346 Mesonemoura sichuanensis Du & Ji , sp. nov. ( Figs. 5–8 ) MATERIAL EXAMINED HOLOTYPE 3 , CHINA , Sichuan province , Litang county , 25-VI-2009 , N 30° 011' E 100° 317', 4,300 m asl , Leg. Qian Yu-Han . PARATYPES , 1 3 , the same data as holotype ; 2 33 , Sichuan province , Luding county , Hailuogou , 3-VII-2009 , ', N 29° 60.3' E 102° 076 E, 2,200m , Leg. Qian Yu-Han ; 66 33 , Sichuan province , Luding county , Yangjiageng river , 4-VII-2009 , N 29° 52.877' E 102° 1.193' E, 3,646 m asl , Leg. Qian Yu-Han ; 1 3 , Tibet , Bomi county , 21-VI-2009 , N 29° 48.380' E 95° 41.956' , 3,522 m asl , Leg. Qian Yu-Han . MALE Head and antennae dark brown; pronotum brown, angles blunt rounded. Wings hyaline, veins brown. Legs brown, the middle of femora slightly brown. Forewing length 6.2-6.7 mm , hind wing length 5.2-5.6 mm . Tergum 1-8 sclerotized at anterior margin laterally. Tergum 9 ( Fig. 6 ) sclerotized,with a small notch mid-posteriorly,both sides of the notch forming an obtuse angle with several short spines. Tergum 10 sclerotized. Hypoproct ( Fig. 5 ) broad basally, abruptly tapering towards the apex; vesicle slender, length 3 × width. Paraprocts ( Figs. 5, 7 ) divided into 3 lobes; inner lobe sclerotized, large, triangular; median lobe branched into 2 portions, inside portion of median lobe membranous, bearing many hairs, fused with outer lobe, another portion sclerotized, slender, slightly longer than membranous portion; outer lobe slender, sclerotized, basal part recurved along basal of cerci, other part fused with membranous portion of median lobe. Epiproct ( Figs. 6, 8 ) dorsal sclerite sclerotized basally, apical portion membranous; lateral sclerite sclerotized; ventral sclerite slightly sclerotized, basal broad, 2 × width of dorsal sclerite, apex narrowed distinctly, apical portion inserted between folds of dorsal sclerite, apex extended distally, forming a long slightly sclerotized flagellum; the flagellum broad basally, tapering towards the apex, with a pointed tip; epiproct ventral sclerite with several spines. FEMALE Unknown. DISTRIBUTION CHINA ( Sichuan province ; Tibet Autonomous Region ) . Figs. 9–15. Mesonemoura sinistracurva Du & Wang , sp. nov. 9. Male terminalia, dorsal; 10. Male terminalia, ventral; 11. Male terminalia, lateral; 12. Male paraproct (lef); 13. Male epiproct, dorsal; 14. Male epiproct, ventral; 15. Male epiproct, lateral. ETYMOLOGY The new species is named for the type locality, Sichuan . REMARKS This species is characterized by tergum 9 forming a pair of obtuse angle mid-posteriorly, and by the ventral sclerite of epiproct basal broad, 2 × width of dorsal sclerite. The new species is close to M. spiroflagellata ( Wu 1973 ) . But in the new species, basal of ventral sclerite 2 × width of dorsal sclerite, while ventral sclerite is not much wider than basal of dorsal sclerite in M. spiroflagellata . In M. spiroflagellata , tergum 9 does not form angles.