Strumigenys hexamera (Brown, 1958) Fig. 21D–F; Table 2 Epitritus hexamerus Brown, 1958: 70, figs 1–3 (w.q.) JAPAN. Palearctic. Pyramica hexamerus – Bolton 1999: 1672. Strumigenys hexamera – Baroni Urbani & De Andrade 2007: 122. Material examined MAINLAND CHINA – Hainan Province • 1 worker; Bawangling, BWLP12; 19.093236° N, 109.200057° E; 4 Jul. 2016; L. Wang leg.; Winkler, 4 corners; IBBL • 1 worker; Bawangling, BWLR7; 19.194981° N, 109.020097° E; 15 Jul. 2016; L. Wang leg.; Winkler, 12 random; IBBL • 2 workers; Bawangling, BWLS10; 19.118784° N, 109.155618° E; 9 Jul. 2016; L. Wang leg.; Winkler, 12 random; IBBL • 1 worker; Bawangling, BWLS12; 19.117962° N, 109.130545° E; 10 Jul. 2016; L. Wang leg.; Winkler, 12 random; IBBL • 1 worker; Bawangling, BWLS9; 19.089728° N, 109.191270° E; 9 Jul. 2016; L. Wang leg.; Winkler, 12 random; IBBL • 6 workers; Huoshankou, HSK3; 5 Jul. 2015; L. Wang leg.; Winkler, 4 corners; IBBL • 3 workers; Jianfengling, JFLFW1; 19.117° N, 109.152° E; 24 Dec. 2015; L. Wang leg.; Winkler, 4 corners; IBBL • 1 worker; Yinggeling, YGLK10; 19.078737° N, 109.503146° E; 2 Aug. 2016; L. Wang leg.; Winkler, 4 corners; IBBL • 1 worker; Yinggeling, YGLK11; 19.078017° N, 109.504241° E; 2 Aug. 2016; L. Wang leg.; Winkler, 12 random; IBBL • 1 worker; same collection data as for preceding; Winkler, 4 corners; IBBL. Measurements Workers TL 2.1–2.4, HL 0.48–0.54, HW 0.49–0.55, MandL 0.18–0.21, SL 0.21–0.24, EL 0.031 –0.038, PW 0.27– 0.30, ML 0.56–0.62, PL 0.22–0.27, PH 0.11–0.13, DPW 0.15–0.17, PPL 0.15–0.18, GL 0.51–0.61, CI 101–104, MI 37–40, SI 42–44, OI 6–8, LPI 45–49, DPI 62–68 (n=4). Geographic range Native: Japan (mainland and Ryukyu Islands), South Korea, Taiwan. Introduced: mainland China (Hainan, Hong Kong), Ogasawara Islands (Japan), United States. New record for Hainan. Ecology Collected in primary forest, secondary forest, urban forest and rubber plantations. Comments This species has been tentatively classified as introduced for its record in Hong Kong due to its tramp characteristic (Tang et al. 2019). The new record in Hainan indicates that its presence in nearby Guangdong and Guangxi provinces is likely.

Published as part of Tang, Kit Lam & Guénard, Benoit, 2023, Further additions to the knowledge of Strumigenys (Formicidae: Myrmicinae) within South East Asia, with the descriptions of 20 new species, pp. 1-144 in European Journal of Taxonomy 907 on pages 64-65, DOI: 10.5852/ejt.2023.907.2327, http://zenodo.org/record/10148811