Notes on the genus Rhyncocheilus in China (Coleoptera, Staphylinidae Staphylininae) with descriptions of three new species Author Tang, Liang College of life sciences, Shanghai Normal University, 100 Guilin Road, 1 Educational Building 323 Room, Shanghai, 200234 P. R. China. Author Schillhammer, Harald Naturhistorisches Museum, Burgring 7, A- 1010 Wien, Austria. Author Zhao, Xin 0000-0001-8144-9288 College of life sciences, Shanghai Normal University, 100 Guilin Road, 1 Educational Building 323 Room, Shanghai, 200234 P. R. China. & 2431832783 @ qq. com; https: // orcid. org / 0000 - 0001 - 8144 - 9288 2431832783@qq.com text Zootaxa 2021 2021-03-18 4948 1 99 112 journal article 7556 10.11646/zootaxa.4948.1.5 9071bf14-8c4a-4e46-8ce8-2d1171712022 1175-5326 4616173 EE775F60-7A04-4DBF-AE0E-C1C4F4F7F030 Key to Chinese species of Rhyncocheilus 1 Elytra without patch of white pubescence; abdominal tergites III–VII with pair of oblique accessory lines; head shorter, with HW/HLŻ1.10........................................................................................ 2 - Elytra with patch of white pubescence; abdominal tergites III–VII without pair of oblique accessory lines; head longer, with HW/HLž1.04........................................................................................ 4 2 Antennomeres 1 and 2 reddish. Habitus: fig 1 in Schillhammer, 2012 ; aedeagus: figs 23a–c in Schillhammer, 2012 . China ( Yunnan )......................................................................................... R . aureus - Antennomeres 1–7 reddish.............................................................................. 3 3 Robust body form as in Figs 1, 2 ; forebody with greater number of black markings; abdominal segments III– V with more ex- tensive white pubescence; abdominal tergite VII with patch of white pubescence longer. Aedeagus : Figs 30–33 . China ( Fujian, Guangdong, Yunnan ), Myanmar .............................................................. R. rugulipennis - Slender body form as in Figs 3, 4 ; forebody with fewer black markings; abdominal segments III–V with less white pubescence; abdominal tergite VII with patch of white pubescence shorter. Aedeagus: Figs 34–37...................... R . huanghaoi 4 Vertex of head with sharp V-shaped incision (fig. 22 in Schillhammer, 2012 ) in front of indistinctly carinate gibbosity; abdomi- nal tergite VII without patch of white pubescence. Habitus: Figs 5, 6 ; aedeagus: Figs 38–41 . China ( Henan , Hubei , Gansu )............................................................................................ R. henanensis - Vertex of head without sharp V-shaped incision in front of indistinctly carinate gibbosity; abdominal tergite VII with large patch of white pubescence................................................................................... 5 5 Body blackish, ventral side of head mainly black. Habitus: Figs 11, 12 ; aedeagus: Figs 54–57 . China ( Yunnan ).................................................................................................. R. yangxiaodongi - Body brownish, ventral side of head reddish ( Fig. 8 )......................................................... 5 6 Labrum with more setae ( Fig. 27 ); silvery pubescent patches on elytra and abdominal tergite VII larger. Habitus: Figs 9, 10 ; aedeagus: Figs 50–53 . China ( Sichuan ).… R. gonggashanus - Labrum with less setae ( Fig. 24 ); silvery pubescent patches on elytra and abdominal tergite VII smaller ( Fig. 7 ).......... 7 7 Body color darker; anterior portion of mesoventrite broad, lateral margins of mesoventral process more or less straight (fig. 31 in Schillhammer, 2012 ). Habitus: Figs 7, 8 ; aedeagus: Figs 42–49 . China ( Sichuan ).................... R. griseosericans - Body color lighter; anterior portion of mesoventrite narrower, lateral margins of mesoventral process slightly convex (fig. 32 in Schillhammer, 2012 ). Habitus: fig. 10 in Schillhammer, 2012 ; aedeagus: figs 30a–c in Schillhammer, 2012 . China ( Sichuan )...................................................................................... R. sommersgutteri