New species group and two new species of the genus Hesperus from China (Coleoptera: Staphylinidae: Philonthina) Cai, Yu-Jie Li, Yue-Yang Tang, Liang Zootaxa 2024 2024-07-02 5474 5 550 562 Cai & Li & Tang 2024 [151,377,942,969] Insecta Staphylinidae Hesperus Animalia Coleoptera 3 553 Arthropoda species flexibilis sp. nov.  ( Figs 3, 4, 14, 20, 30–34)   Type material.   Holotype. China: ♂glued on a card with labels as follows: “ China: Xizang Prov., Motuo County, Renqingbeng Temple, 29°18′5″N, 95°20′39″E, alt.  2000m,  15.VI.2023, Tang, Peng, Song, Zhang & Caileg.” “Holotype /  Hesperus flexibilis/ Cai, Li & Tang” [red handwritten label] ( SHNU).   Description.Measurements of male: BL: 15.10 mm, FL: 6.79 mm. HL: 1.64 mm, HW: 2.95 mm, EYL: 0.81 mm, TL: 0.65 mm, PL: 2.26 mm, PW: 2.26 mm, EL: 3.35 mm, EW: 3.47 mm. HW/HL: 1.79, TL/EYL: 0.81, PL/ PW: 1.00, EL/EW: 0.96. The species is extremely similar to  H. watanabei, so only a comparative description is given here. From  H. watanabei,  H. flexibilisdiffers by antennomeres 8–11 creamy white ( Fig. 14) (only three antennomeres (9-11) creamy white in  H. watanabei); posterior portion of head with less dense punctation ( Fig. 20); aedeagus ( Figs 30, 31, 32) with paramere slenderer, peg setae more regularly arranged toward base. In addition, it differs by bigger eyes, slightly slenderer fore body: HW/HL about 1.79 ( 1.78–1.81 in  H. watanabei), TL/EYL about 0.81 ( 0.84–1.03 in  H. watanabei), PL/PW about 1.00 ( 0.93–0.96 in  H. watanabei), EL/EW about 0.96 ( 0.90–0.92 in  H. watanabei).   Etymology.The holotypehad escaped quickly from the gaps of the breeding container twice without the first author’s knowledge, thus the species is named flexibilis which means flexible.   Distribution.This species is only known in Xizang province, southwestern China.  Bionomics.The species was collected by a rotten fungi trap. 4905212313 2023-06-15 SHNU Cai China Motuo County 2000 29.301388 Renqingbeng Temple 20 95.34417 China 3 553 1 1 Xizang holotype