A second specimen of Colilodion tetramerus Löbl (Coleoptera: Staphylinidae: Pselaphinae) Author Yin, Zi-Wei Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai 200234, China Author Song, Xiao-Bin Room 401, No. 1, Lane 280, Lixi Road, Changning District, Shanghai 200050, China Author Chen, Jia-Wei Diaoluoshan Branch, Hainan Tropical Rainforest National Park Administration, 572400 Lingshui County, Hainan, China text Zootaxa 2023 2023-10-11 5353 4 393 394 http://dx.doi.org/10.11646/zootaxa.5353.4.6 journal article 272018 10.11646/zootaxa.5353.4.6 ab136eda-cf71-4c24-9665-83fad102a156 1175-5326 8430810 Colilodion tetramerus Löbl, 1998 ( Fig. 1 ) Colilodion tetramerus Löbl, 1998: 467 . Type locality: China , Hainan , Ba Wang Ling N. R., 1000 m . FIGURE 1. Colilodion tetramerus . A. Habitus. B. Apex of antenna, showing sensillum. C. Distribution; circle—known distribution, square—new record. Scale bar: 0.5 mm. Material examined. 1 ex. , ‘ China : Hainan , Lingshui Co. , Diaoluoshan N. R ., 18°43’39”N , 109°51’55”E , 950 m , 5.viii.2023 , leaf litter, Berlese funnel , Xiao-Bin Song leg., [DZẾBƔƜ]’ ( SNUC ) . Comments. The specimen ( Fig. 1A ) is undoubtedly conspecific with the population of Bawanglin based on the identical four-segmented antennae, large sensilla of the antennomeres 4 ( Fig. 1B ), and remaining external characters. The only other species showing a similar morphology is C . thienmu Nomura & Sugaya from central Vietnam , which also has four segments on each antenna. However, the latter species has more rounded lateral margins of the head, the antennomeres 4 are much more curved near the bases, and the apical sensilla of antennomeres 4 are much less pronounced. Distribution. Southern China : Hainan ( Fig. 1C ).