ON : Lethe gemina yao Sugiyama, 1996 OD : Pallarge 5:1-2, pl.1, figs.1(HT,♂), 2(HT,♂Un). TL : Dayao Mts., Guangxi, S.China. Distribution : C.Thailand, Laos, Vietnam, Guangxi.

Holotype ♂, 22.Jun.1995. Dayao Mts., Guangxi, S.China. H.Sugiyama leg. (in coll. H.Sugiyama)

[ THAILAND ]
Lethe gemina yao ; Saito & Inayoshi,2018 : 29, fig.13,♂(Un). (Phetchabun)
Lethe gemina yao ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2023- : Butterflies of Thailand, fig. (Phetchabun) (accessed: 2023.06.30)

[ LAOS ]
Lethe gemina ; Osada, Uémura & Uehara,1999 : 210, pl.90, fig.♀. (Lak Sao)
Lethe gemina ssp. ; Uémura,2003 : 5, fig.36,map.
Lethe gemina yao ; Uémura,2006 : 4.
Lethe gemina yao ; Nakamura & Wakahara,2012 : 48.

[ VIETNAM ]
Lethe gemina yao ; Monastyrskii,2005 : 70, pl.18, figs.3a♂,3b♂(Un). (N: Tam Dao; Na Hang)
Lethe gemina yao ; Monastyrskii & Devyatkin,2015 : 23. (N / C)

[ THAILAND ]
Phetchabun : Khao Kho dist., 2015.10.04. 1♂ (photo by K.Yano).

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This is the first record from Thailand.
A photo was taken by Koichi Yano in Kheo Kho dist., Phetchabun on 4.Oct.2015, but no specimens are available yet. Therefore details are unknown. I tentatively treat it as ssp.yao. Further taxonomic study with specimen is needed.

Sugiyama, H.,1996 : New Butterflies from Western China (IV).
Pallarge 5:1-11.

♂, 2015.10.04. Phetchabun, Thailand. (photo by K.Yano)

1999.07.27 - 2023.07.31.