♂, Vinh Phuc, Vietnam.

ON : Lethe syrcis diunaga Fruhstorfer, 1911 OD : in Seitz, Grossschmett. Erde 9:323, t.98e. TL : Mauson Mts., Tonkin. Distribution : Laos, N.Vietnam.

Syntype ♂, Apr.-May. Montes Maouson, 2-3000ft, Tonkin.

[ LAOS ]
Lethe syrcis diunaga ; Masui & Uehara,1999 : 19,22, fig.12,♂,♂(Un). (Lak Sao)
Lethe syrcis diunaga ; Osada, Uémura & Uehara,1999 : 210, pl.92, fig.♂. (Lak Sao)
Lethe syrcis diunaga ; Uémura,2003 : 5, fig.34 map.
Lethe syrcis diunaga ; Nakamura & Wakahara,2012 : 48, pl.7, fig.Sa-35,♀,♀(Un). (Phongsali: Near Boun Thai)

[ VIETNAM ]
Lethe syrcis diunaga ; Fruhstorfer,1911 : 323. (Tonkin: Mauson Mts.)
Lethe syrcis ; Vitalis,1919 : 223. (Tonkin)
Lethe syrcis f. diunaga ; Dubois & Vitalis,1924 : 29. (Tonkin: Mts. Mauson)
Lethe diunaga ; Lemée,1950 : 8. (Backan)
Lethe syrcis diunaga ; Metaye,1957 : 103. (N)
Lethe syrcis diunaga ; Luong et al.,2004 : 4, 47, figs.♂,♂(Un). (Cuc Phuong)
Lethe syrcis diunaga ; Ikeda et al.,1999 : 53, fig.4:15♀,16♀(Un). (Cuc Phuong)
Lethe syrcis diunaga ; Monastyrskii,2005 : 66-67, pl.17, figs.5a♂,5b♂(Un). (N: Tam Dao; Na Hang; Ba Vi; Pu Luong; Cuc Phuong / C: Pu Mat; Xuan Lien; Pu Hoat)
Lethe syrcis diunaga ; Monastyrskii & Devyatkin,2015 : 23. (N / C: to Nghe An)

[ VIETNAM ]
Vinh Phuc : 1♂.

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Fruhstorfer, H.,1911 : 4. Familie: Satyridae in Seitz, Gross-Schmett. Erde 9
313-328. (25.Apr.1911)

1998.12.26 - 2022.03.31.