A new Batricavus species from East Malaysia (Coleoptera: Staphylinidae: Pselaphinae) Author Yin, Zi-Wei Department of Biology, College of Life and Environmental Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P. R. China. Author Löbl, Ivan Muséum d’histoire naturelle, Route de Malagnou 1, CH- 1208 Geneva, Switzerland. Author Li, Lizhen Department of Biology, College of Life and Environmental Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P. R. China. pselaphinae@gmail.com text Revue suisse de Zoologie 2014 2014-03-31 121 1 11 13 journal article 231090 10.5281/zenodo.5822964 bc3c133e-8164-48e5-996b-c6e0494f9e8f 0035-418X 5822964 Revised key to male Batricavus 1a Anterior margin of frons conspicuously protruding anteriorly to form two horn-like projections ( Fig. 1A ); antennomeres VI greatly enlarged, with large mesal cavity ( Fig. 1B ). (East Malaysia : Sabah ). B. cornutus sp. nov. 1b Frons simple, without modification; antennomeres VI not enlarged........ 2 2a Protibiae simple; metafemora near apical fourth broadened mesally ( Yin & Li, 2012: 37 , fig. 2B); tergite IV with large median cavity ( Yin & Li, 2012: 37 , fig. 2A). (South China : Hainan )......... B. abdominalis Yin & Li 2b Protibiae expanded laterally, either at apical forth ( Yin et al ., 2011: 4 , fig. 8) or near middle ( Yin & Li, 2012: 38 , fig. 3A); metafemora and tergite IV simple.............................................. 3 3a Antennomeres VIII much larger than VII ( Yin et al. , 2011: 4 , fig. 6); apical fourth of protibiae expanded laterally and angular ( Yin et al ., 2011: 4 , fig. 8). (South China : Guangdong ; East China : Zhejiang )................................................... B. tibialis Yin & Li 3a Antennomeres VIII distinctly smaller than VII ( Yin & Li, 2012: 36 , fig. 1B); protibiae expanded laterally near middle and angular ( Yin & Li, 2012: 38 , fig. 3A). (South China : Hainan )......... B. hainanensis Yin & Li