♂, Luang Phabang, Laos. (photo by H.Onodera)

ON : Mycalesis siamica Riley & Godfrey, 1921 OD : J. nat. Hist. Soc. Siam 4(3):170, pl.4, figs.2,♂,3,♀. TL : Prae, N.Siam. Distribution : Thailand, Laos.

Syntype 1♂, Rh117, Apr.1918. Me Song forest, Prae, N.Siam. (NHML)
Syntype 1♀, Rh118, Apr.1918. Me Song forest, Prae, N.Siam. (NHML)

[ THAILAND ]
Mycalesis siamica ; Godfrey,1930 : 251. (Prae: Me Song forest)
Mycalesis deficiens siamica ; Aoki & Yamaguchi,1984 : 56-57. (by literature)
Mycalesis deficiens siamica ; Pinratana,1988 : 24. (list only)
Mycalesis siamica ; Kimura et al.,2016 : 185. (by literature)

[ LAOS ]
Mycalesis deficiens siamica ; Motono & Negishi,1989 : 65, not fig. (list only)
Mycalesis deficiens siamica ; Osada, Uémura & Uehara,1999 : 211, not fig. (list only)
Mycalesis deficiens siamica ; Uémura,2004 : 3.
Mycalesis deficiens siamica ; Uémura,2006 : 5, fig.23,map. (Nam Kata)
Mycalesis siamica ; Nakamura & Wakahara,2008b : 55-56, figs.13,♂,♂(Un),a,b(♂genitalia). (Bolikhamxai: Nam Kata)
Mycalesis siamica ; Uémura,2011 : 2. (C: Nam Kata)
Mycalesis siamica ; Nakamura & Wakahara,2012 : 48, pl.7, figs.Sa-55,♂,♂(Un). (Bolikhamxai: Namkata)
Mycalesis siamica ; Onodera,2022 : 58, pl.173, figs.♂,♂(Un). (Luang Phabang: Chamlong)

[ LAOS ]
Luang Phabang : 1♂ (photo by H.Onodera).

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The butterfly is rare in montane forests at moderate elevations.
This species was found recently in Laos, however, it has never been found in Thailand except the type specimens. The type locality 'Phrae' is slightly dubious. I consider it could be from other locations. Further distributional research is needed.

Riley N.D. & Godfrey E.J.,1921 : Some undescribed Rhopalocera from Siam.
J. nat. Hist. Soc. Siam 4(3):167-190, 4pls.

Nakamura, N. & Wakahara, H.,2008 : Notes on the butterflies of Laos (2):
new records of six species and several remarkable species from central and Southern Laos. (in Japanese)
Butterflies. 49:49-58.

1998.12.05 - 2023.07.31.