♂, Chiang Mai, Thailand. (photo by K.Saito)		♀, Lampang, Thailand. (photo by K.Saito)
♂, Chiang Mai, Thailand.(photo by K.Saito)		♂, Lampang, Thailand. (photo by K.Saito)

♂, Phrae, Thailand. (photo by K.Saito)		♀, Phrae, Thailand. (photo by K.Saito)

ON : Stichophthalma louisa siamensis Rothschild, 1916 OD : Novit. zool. 23:308. TL : 'Siam'. (♀, NHML) Distribution : N. to C.Thailand. ● ssp.mathilda ● ssp.siamensis ● ssp. ● ssp.ranohngensis

♀ Type HT (red), Rh.15496. (NHML, examined)

[ THAILAND ]
Stichophthalma louisa siamensis ; Godfrey,1930 : 258. (by literatur, Rothschild, Nov.Zool.23:308)
Stichophthalma louisa spp. ; Nishimura,1998 : 124, figs.24,♂,25,♂(Un),26,♂,27,♂(Un),28,♂,29,♂(Un),30,♀,31,♀,32,♀(Un),64,♂genitalia. (Phrae: Wang Chin; Lampang: Mae Mo)
Stichophthalma louisa mathilda ; Ek-Amnuay,[2007] : 318, pl.131, figs.A10c♂,♂(Un),♂,♂(Un),♀. (Wang Chin; Thung Salaeng Luang) (in part)
Stichophthalma louisa louisa ; Ek-Amnuay,2012 : 316. (Winang Pa Pao) (in part)
Stichophthalma louisa mathilda ; Ek-Amnuay,2012 : 318, pl.131, figs.N156c♂,♂(Un),♂,♂(Un),♀,♀(Un). (Wang Chin; Thung Salaeng Luang)
Stichophthalma louisa mathilda ; Kimura et al.,2016 : 142, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un),♀,♀(Un). (Ban Salok; Thung Salaeng Luang)
Stichophthalma mathilda siamensis ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2024- : Butterflies of Thailand, figs. (Chiang Mai; Lampang; Phetchabun) (accessed: 2024.05.06)

[ THAILAND ]
Chiang Rai : 2♂ (photo by K.Saito and M.Hayashi).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Chiang Mai : 4♂ 2♀ (photo & photo by K.Saito).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Lampang : 4♂ 2♀ (photo & photo by K.Saito).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Phrae : 2♂ 2♀. (photo by K.Saito).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The butterfly is locally very common in montane bamboo forests at moderate to high elevations (Alt. 700 - 1550m).
The taxon siamensis was described by Rothschild,1916 and the type locality was known only 'Siam'. Then, For a long time, it was thought to be a S.E.Thailand population. However, an examination of the type specimen in the NHML, I realized that the spear-shaped black markings on the UpF is not as well developed as in the S.E.Thailand population, and that the N.Thailand population corresponds to this taxon because of its shape. I consider the type locality most likely to be somewhere around Chiang Mai prov.
The populations from Phrae and the eastern side of Lampang, N.Thailand are slightly different, being highly variable and unstable. In general, individuals from Chiang Rai to the western side of Lampang are similar to ssp.siamensis, but the ground color of the upper side is darker and occasionally individuals rather similar to ssp.mathilda occur. It seems to be a transition to ssp.siamensis. Further taxonomic and distributional studies, including DNA analysis, are needed.

Rothschild, L.,1916 : Notes on Amathusiidae, Brassolidae, Morphidae, etc., with Descriptions of New Forms.
Novit. zool. 23:299-318.

Nishimura, M.,1998 : Notes on the genus Stichophthalma (Lpidoptera, Nymphalidae), with descriptions of a new species from Indo-China.
Tyô to Ga. 49(2):115-132, 69 figs.

Monastyrskii, A.L. & Devyatkin, A.L.,2008 : Revisional notes on the genus Stichophthalma C.& R.Felder, 1862. (Lepidoptera, Amathusiidae)
Atalanta 39(1-4):281-286, Col.pl.20A-22.

Monastyrskii, A.L.,2011 : Butterflies of Vietnam. Vol.3. Nymphalidae: Danainae, Amathusiinae
Plan-o-rama Media Co Ltd., Hanoi, Vietnam. 151pp. + 31 col. pls.

♂, Lampang, Thailand.	♀, Lampang, Thailand.
♂, Chiang Rai, Thailand. (photo by M.Hayashi)	♂, Lampang, Thailand.
♂, Chiang Mai, Thailand.	♀, Chiang Mai, Thailand.

2020.06.30 - 2024.05.31.