Strumigenys amnesia Bolton, 2000 Strumigenys amnesia Bolton, 2000: 838 (w.) WEST MALAYSIA. Indomalaya. Material examined THAILAND – Trang Province • 2 workers; Khao Chong; 7.54401° N, 99.80087° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 22 workers, 3 queens; Khao Chong; 7.54525° N, 99.79203° E; 26 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 24 workers, 1 queen; same collection data as for preceding. Measurements Workers TL 2.3–2.5, HL 0.62–0.66, HW 0.54–0.59, MandL 0.28–0.31, SL 0.34–0.38, EL 0.046 –0.055, PW 0.24– 0.28, ML 0.56–0.61, PL 0.22–0.26, PH 0.10–0.13, DPW 0.10–0.11, PPL 0.11–0.15, GL 0.49–0.54, CI 86–89, MI 45–47, SI 61–65, OI 8–10, LPI 47–50, DPI 40–47 (n =6). Queens TL 2.7, HL 0.63–0.66, HW 0.59–0.61, MandL 0.29–0.30, SL 0.34–0.37, EL 0.097 –0.109, PW 0.31– 0.33, ML 0.68–0.70, PL 0.27–0.28, PH 0.12–0.13, DPW 0.15, PPL 0.13–0.14, GL 0.64–0.67, CI 92–95, MI 43–46, SI 57–60, OI 16–18, LPI 43–47, DPI 53–57 (n =3). Geographic range Indonesia (Sumatra), Malaysia (Peninsular), Thailand (Trang). Ecology Collected in primary and old secondary forests. Comments Bolton (2000) noted that workers from Thailand and Sumatra (HL 0.64–0.69, MandL 0.28–0.33, SL 0.35–0.39) were slightly smaller than the type specimens from Malaysia (HL 0.72–0.76, MandL 0.34– 0.36, SL 0.42–0.44). The workers from Thailand we measured (HL 0.63–0.66, MandL 0.29–0.30, SL 0.34–0.37) also had morphological measurements that fell within the typical range reported by Bolton.

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 14-15, DOI: 10.5852/ejt.2023.907.2327, http://zenodo.org/record/10148811