Key to species of Hybridolinus 1. Head and pronotum without microsculpture ................................................................................................................ 2 - Head and pronotum with distinct microsculpture......................................................................................................... 4 2. Tergites III–V entirely black, posterior half of tergite VI and entire tergite VII reddish; elytra brick-red, each with only a slight “shadow” postero-laterally; eyes smaller, 1.15 times as long as tempora ..... H. singularis Schillhammer - Tergites III–VII with posterior margins markedly reddish; elytra brick-red, each with variably large, well delimited black marking laterally; eyes very large, 1.75–2.00 times as long as tempora............................................................. 3 3. Antennae with last three segments creamy white; underside of paramere with 18–19 sensory peg setae on each lobe (Figs. 6 H, 7B) ..................................................................................................... H. fengyangshanus Li & Zhou sp. n. - Antennae with last two segments creamy white; underside of paramere with 13–15 sensory peg setae on each lobe .. ........................................................................................................................................ H. hesperoides Schillhammer 4. Body entirely black........................................................................................................... H. diabolicus Schillhammer - Body not entirely black: elytra, tergites and legs at least partly reddish-testaceous, reddish-yellow or yellowish...... 5 5. Abdominal tergite VIII partly black ............................................................................................................................. 6 - Abdominal tergite VIII entirely reddish ....................................................................................................................... 7 6. Elytra reddish-testaceous, each elytron with large, triangular, postero-lateral pitchy patch .......................................... ............................................................................................................................................. H. smetanai Schillhammer - Elytra black with shoulders, epipleura and posterior margins markedly pale yellowish ............................................... ........................................................................................................................................ H. flavocinctus Schillhammer 7. Elytra violaceous........................................................................................................................................................... 8 - Elytra reddish.............................................................................................................................................................. 11 8. Abdominal tergite VII entirely reddish ............................................................................... H. daliensis Schillhammer - Basal third or half of abdominal tergite VII black........................................................................................................ 9 9. Femora and tibiae entirely yellow .................................................................................. H. meilishanus Schillhammer - Femora and apices of tibiae black............................................................................................................................... 10 10. Pronotum with punctures separated by 1–2 times their diameter; paramere with angular emargination (Figs. 6 F, 7D) ................................................................................................................................. H. baoxingensis Li & Zhou sp. n. - Pronotum with punctures separated by 2–5 times their diameter; paramere with rounded emargination (similar to Fig. 7 G) ................................................................................................................................... H. similis Schillhammer 11. Legs entirely yellow.......................................................................................................... H. jizushanus Schillhammer - Femora and apices of tibiae dark ........................................................................................ H. decipiens Schillhammer 1. Hybridolinus baoxingensis Li & Zhou sp. n. (Figs. 1–3, 6 F, 7D–F)

Published as part of Li, Liang & Zhou, Hong-Zhang, 2010, Taxonomy of the genus Hybridolinus Schillhammer (Coleoptera: Staphylinidae: Philonthina) from China, pp. 34-46 in Zootaxa 2360 on page 36, DOI: 10.5281/zenodo.275702