Two new species of Feroperis Lafer (Carabidae, Pterostichus) from China, with a key to all known Chinese species in this subgenus Author Sun, Xiaojie Author Shi, Hongliang Author Sang, Weiguo Author Axmacher, Jan Christoph text ZooKeys 2018 799 95 114 http://dx.doi.org/10.3897/zookeys.799.28834 journal article http://dx.doi.org/10.3897/zookeys.799.28834 1313-2970-799-95 8258921BCA27422A8586951C0968D63E Pterostichus (Feroperis) acutidens (Fairmaire, 1889) Fig. 14A Omaseus acutidens Fairmaire, 1889: cc (original: Omaseus ; syntype in Museum National d'Histoire Naturelle, Paris, France; type locality: "Pekin" ); Jedlicka 1962 : 251; Lafer 1979 : 8. Type locality. Beijing. Type material examined. Syntype of Omaseus acutidens Fairmaire, 1 male (MNHN), "Omaseus / acutidens / Fairm. / Pekin"; "SYNTYPE" [red label]; "Omaseus / acutidens / Fairmaire / Det. Shi H.L. 2011"; "Museum Paris / 1906; Coll. Leon Fairmaire". Other material examined. 7 specimens (IZAS), "China, Hebei Province, Xinglong County, Wuling Mountain. 1994.V.23, YU Peiyu"; 5 specimens (IZAS), "China, Beijing, Huairou District, Yunmeng Mountain. 800 m, 2005.VII.13, LIU Ye"; 628 specimens (IZAS), "China, Beijing, Dongling Mountain. Pit fall trap, 1160-1410 m, 2011.VI.10-2012.IX.13, ZOU Yi". Figure 14. Habitus of Pterostichus (Feroperis) spp. from China. A P. acutidens (Fairmaire), male syntype (MNHN) B P. melanodes (Chaudoir), female syntype (MNHN) C P. rasilis Park & Kwon, male from Changbai Mountain (IZAS). Diagnosis. Body length 14-17 mm, blackish, elytra shiny without metallic lustre. Pronotum subcordate, widest at approximately anterior 2/5; lateral margins of pronotum strongly constricted to the base; posterior angles strongly protruding and forming very strong denticles, lateral border at the posterior denticles strongly widened, at least twice as wide as the lateral broder anterior to the posterior angles; lateral border not interrupted before posterior denticles; basal foveae with a few large punctures. Elytra with humeral teeth faint; the third interval usually with 3-4 setigerous pores close to the second stria, but position variable. Apical lamella of aedeagus approximately triangular, gradually narrowed to apex, apex not widened or thickened; in lateral view, apical lamella distinctly bent downwards. Right paramere long and bent, apex distinctly compressed. This species can be distinguished from all the other species of the subgenus by its male genitalia: aedeagus with apical lamella simple and distinctly bent downwards. From the external appearance, this species is superficially similar to P. jungens Tschitscherine , 1893; they can be distinguished by: the pronotal lateral channel before posterior angles wider in P. acutidens than in P. jungens ; and quite different shape of apical lamella of aedeagus. Distribution. This species is only known from Beijing and adjacent regions in the north part of Hebei Province.