♂, Nan, Thailand.		♀, Phrae, Thailand.
♂, Lampang, Thailand.		♀ (dsf), Chiang Mai, Thailand.
♂ (dsf), Nan, Thailand.		♀ (dsf), Nan, Thailand.
♂ (dsf), Sekong, Laos.		♀ (dsf), Champasak, Laos.
♂ genitalia, Lampang, Thailand.

ON : Gerydus ancon siamensis Godfrey, 1916 OD : J. nat. Hist. Soc. Siam 2: 134. TL : "Muak Lek, E.Siam" [Muak Lek, Saraburi, Thailand]. (NHML) Distribution : N. to E.Thailand, Laos, Cambodia, Vietnam. ● ssp.siamensis ● ssp.ancon ● ssp.

Holotype ♂, 8.Jan.1914. Muak Lek, E.Siam. (NHML)

[ THAILAND ]
Gerydus ancon siamensis: Riley & Godfrey,1921 : 179–180, pl.5, figs.8,♂,9,♀. (Prae: Me Song forest)
Gerydus ancon siamensis: Godfrey,1927 : 125. (N)
Miletus ancon siamensis: Godfrey,1930 : 312. (Prae: Me Song forest; Muak Lek)
Miletus ancon siamensis: Eliot,1961 : 171. (E; N; N.W.)
Miletus ancon siamensis: Pinratana,1981 : 29, pl.3, figs.10,♂,12,♂. (Chiamg Mai; Chaiyaphum; Phetchabun; Phrae; Nakhon Ratchasima)
Miletus ancon ancon: Ek-Amnuay,[2007] : pl.245, fig.L32a♀(bottom-right). (partim)
Miletus ancon siamensis: Ek-Amnuay,[2007] : 542, pl.246, figs.L32b♂,♂(Un),♀,♀(Un). (Lampang; Chaiyaphum; Doi Phu Kha)
Miletus ancon ancon: Ek-Amnuay,2012 : pl.251, fig.L56,♀(bottom-right). (partim)
Miletus archilochus siamensis: Ek-Amnuay,2012 : 556, pl.252, figs.L57,♂,♂(Un),♀,♀(Un). (Lampang; Phu Phan; Phu Khieo; Doi Phu Kha)
Miletus ancon siamensis: Kimura et al.,2014 : 3, figs.♀,♀(Un). (Ban Salok; Phu Kradung; Phu Khiewo; Mae Sam)
Miletus ancon siamensis: Sophonviwatkul et al.,2023– : Butterflies of Thailand, figs. (Nakhon Nayok) (accessed: 2023.04.28)

[ LAOS ]
Miletus ancon siamensis: Motono & Negishi,1989 : 68, pl.98, figs.A7,♂,A8,♂(Un). (Vang Vieng; Vientiane)
Miletus ancon siamensis: Osada et al.,1999 : 214, pl.107, figs.♂,♀. (Luang Phrabang; Thateng; Oudomxay)
Miletus ancon siamensis: Nimura & Wakahara,2005 : 45. (Thabeng)
Miletus archilochus siamensis: Nakamura & Wakahara,2012 : 51.
Miletus ancon siamensis: Onodera,2022 : 71, pl.204, figs.♂,♂(Un),♀,♀(Un). (Bolikhamxai: Lak Sao; Khammouan: Nahin)

[ CAMBODIA ]
Miletus ancon siamensis: Kosterin,2020 : 315, fig.6,♀(Un). (Siem Reap)
Miletus ancon siamensis: Chartier & Kosterin,2022 : 120. (Siem Reap)

[ VIETNAM ]
Miletus ancon ancon: Inoué & Kawazoé,1965 : 347, pl.8, figs.59,♀,60,♀(Un). (Banmethuot, Song Be)
Miletus ancon ancon: Luong et al.,2004 : 9, 74, figs.♀,♀(Un). (Cuc Phuong)
Miletus ancon: Monastyrskii et al.,2006 : 42. (Thua Thien Hue: Nam Dong; A Luoi; Huong Thuy)
Miletus ancon ancon: Miyazaki et al.,2006d : 49, figs.L-7,♂,♀. (Lam Dong: Dambri; Dai Duc Me)
Miletus ancon ancon: Monastyrskii & Devyatkin,2015 : 47. (N; C: Quang Binh, Phong Nha)

[ THAILAND ]
Chiang Mai (excluding Omkoi to Mae Chaem Dist.) : 2♂ 5♀ (incl. photo).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Lampang : 2♂ (1♂ genitalia dissected).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Phrae : 3♀.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Nan : 4♂ 8♀.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Phetchabun : 1♂ 4♀ (incl. photo).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Chaiyaphum : 1♂ (photo).

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[ LAOS ]
Bolikhamxai : 1♀.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sekong : 2♂.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Cham Pasak : 1♀.

Jan

Feb

Mar

Apr

May

Jun

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Nov

Dec

The butterfly is locally common in forests at low to moderate elevations (450–1,100 m a.s.l.). Males are territorial on shrubs or undergrowth at forest edges or in open areas within forests from 11:30–13:00.
The record from Cambodia in Chartier & Kosterin (2022) is based on a photo of the underside. It may be the same as the S.E. Thailand population. I tentatively treat it as this taxon, confirmation by specimens is needed.

Godfrey, E.J, 1916. The Butterflies of Siam.
Journal of the natural History Society of Siam, 2: 106–147.

Eliot, J.N, 1961. An analysis of the genus Miletus Hübner (Lepidoptera: Lycaenidae).
Bulletin of the Raffles Museum, 26: 154–177.

Eliot, J.N, 1986. A review of the Miletini (Lepidoptera: Lycaenidae).
Bulletin of the British Museum (Natural History) (Entomology), 53(1): 1–105, 108 figs.

♂, Phetchabun, Thailand.	♀, Phetchabun, Thailand.
♂ (territorial behaviour), Chiang Mai, Thailand.	♀, Nan, Thailand.
♂ (territorial behaviour), Chaiyaphum, Thailand.

1999.07.24 - 2024.12.31.