Tarucus (Kongmingius) waterstradti Druce, 1895 (īa"ĸ) Tarucus waterstradti waterstradti Druce, 1895: 585 for original description + pl. 32, fig. 21 for ♀; Evans (1955): 181 for ♂ genitalia; Seki et al. (1991): pl. 14, L67 for ♂ and ♀ lectotype; Takanami (1992): 42, fig. 13 for ♀ lectotype. Castalius ananda waterstradti: Fruhstorfer (1918): 26; Fruhstorfer (1923): 885 + pl. 153 for ♀. Castalius ananda vileja Fruhstorfer, 1918: 25 for original description + pl. 4, fig. 3 for ♂ genitalia; Fruhstorfer (1923): 885. Tarucus waterstradti vileja: Evans (1955): 186; Maschwitz et al. (1985): 187 for early stages + 189 for underside + 190 for host; D’Abrera (1986): 649 for ♀; Saito & Inayoshi (2018): figs. 58, 59 for ♂ and ♀; van der Poorten & van der Poorten (2020): pl. 77, fig. 15 for ♂ and ♀; Inayoshi (2025): ♀♀. Tarucus dharta Bethune-Baker, 1918: 291 for original description + pl. 14, fig. 15 for ♂ + pl. 17, fig. 14 for ♂ genitalia; Evans (1932): 215; Bailey (1951): 283. Tarucus waterstradti dharta: Evans (1955): 186; Basu et al. (2019): fig. 1a for ♂ lectotype and ♀ paralectotype + fig. 1c for ♂ + fig. 2 for ♂ and genitalia + fig. 3b for ♂ genitalia; Sajan & Sapkota (2024): fig. 18; Inayoshi (2025) and Kunte et al. (2025): ♂♂ and ♀♀ + early stages. Tarucus waterstradti simillimus Schröder & Treadaway, 1985: for original description. Castalius ananda [misid.]: de Nicéville (1884): pl. 1, 11a for ♀. Materials. Ssp. dharta: ♂, 29.I.2023, Thailand, Chiang Mai, Y. Inayoshi leg. (CYI). Ssp. vileja: ♂, 28.XI.2020, Thailand, Yala, Betong, S. Atdhabhan leg.; ♀: 28.VIII.2022, Thailand, Yala, Betong, S. Atdhabhan leg. (CYI). Distribution. India, Nepal, Myanmar, Thailand, Malaysia, Indonesia, Philippines. Remarks. In addition to the differences listed by Evans (1955), this species can be also distinguished from the preceding species by the following characteristics: (i) the marginal spots on the hindwing underside, especially in space 2, are less conspicuous and adorned with blue scales; (ii) the postdiscal spots on the hindwing underside are more developed.

Published as part of Li, Hua-Zhao, Liu, Zhe, Yin, Wen-Xi & Li, Jia-Ling, 2025, Morphological and genetic evidence reveals a new subgenus of Tarucus Moore, [1881] (Lepidoptera: Lycaenidae), pp. 400-408 in Zootaxa 5646 (3) on page 405, DOI: 10.11646/zootaxa.5646.3.4, http://zenodo.org/record/15819057