♂, Nakhon Nayok, Thailand.		♀, Nakhon Nayok, Thailand.
♂, Kanchanaburi, Thailand.		♂, Houaphan, Laos. (photo by H.Onodera)
♂, Chiang Mai, Thailand.		♂, Chiang Mai, Thailand.
♂, Mae Hong Son, Thailand.		♂ genitalia, Chiang Mai, Thailand.

ON : Horaga moulmeina Moore, 1884 OD : Proc. zool. Soc. Lond. 1883(4):525. TL : Moulmein [Mawlamyine, Myanmar]. (NHML) Distribution : Myanmar, Thailand, Laos, Cambodia, Vietnam. ● ssp.moulmeia ● ssp.maenala

Holotype ♂, Moulmein. (NHML)

[ THAILAND ]
'Horaga halba ; Godfrey,1930 : 346. (Ranong: Kao Pawta Luang Ke)'
Horaga moulmeina ; Davidson & Macbeth,1938 : 83. (C: Paknampho)
'Horaga syrinx moulmeina ; Cowan,1966 : 119. (Ranong, by Godfrey's list)'
'Horaga syrinx moulmeina ; Pinratana,1981 : 125. not fig. (Ranong)'
Horaga syrinx moulmeina ; Ek-Amnuay,[2007] : 678, pl.310, figs.L335,♀[♂],♀[♂](Un). (in part)
Horaga syrinx moulmeina ; Ek-Amnuay,2012 : 716, pl.328, figs.L359,♀[♂](left),♀[♂](left,Un). ('Khao Pota' [recte Mae Hong Son]) (in part)
Horaga syrinx moulmeina ; Kimura et al.,2014 : 102. (by literature)
Horaga syrinx moulmeina ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2018- : Butterflies of Thailand, figs. (Kamphaeng Phet; Nakhon Nayok) (accessed: 2023.07.04)

[ LAOS ]
Horaga onyx onyx ; Osada, Uémura & Uehara,1999 : pl.124, figs.♂,♀(Un),♀. (Vientiane; Xam Neua) (in part)
Horaga syrinx moulmeina ; Onodera,2022 : 92, pl.225, figs.♂,♂(Un),♀,♀(Un). (Khammouan: Nahin; Houaphan: Xam Neua)

[ CAMBODIA ]
Horaga syrinx ; Monastyrskii et al.,2011 : 130. (Phnom Samkos W.S.)
Horaga syrinx moulmeina ; Chartier & Kosterin,2022 : 123. (Pursat)

[ VIETNAM ]
Horaga syrinx moulmeina ; Miyazaki, Saito & Saito,2006d : 64, figs.L-112,♂,♀. (Lam Dong: Dambri)

[ THAILAND ]
Mae Hong Son : 2♂.

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Chiang Mai : 3♂.

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Phetchabun : 1♂ (photo).

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Kanchanaburi : 1♂.

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Nakhon Nayok : 3♂ 4♀ (incl. photo & photo by M.Hayashi & S.Sophonviwatkul)

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

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The butterfly is not rare in montane forests at moderate to high elevations (Alt. 700 - 1600m) and is sympatrically distributed with Horaga onyx onyxa. Males are territorial on trees at forest edges or hilltops. Time of male activity is different between the two species. In syrinx from about 11:00 to 14:00 while in onyx from about 14:00 to 16:00.
Cowan (1966) regarded the record from Ranong by Godfrey (1930) as this taxon. However, the possibility of ssp.maenala is also considered and needs to be confirmed by reliable specimens.

Moore, F.,1884 : Descriptions of new Asiatic Diurnal Lepidoptera.
Proc. zool. Soc. Lond. 1883(4):521-535, pls.48-49.

Cowan, C.F.,1966 : Indo-oriental Horagini (Lepidoptera : Lycaenidae).
Bull. Brit. Mus. nat. Hist. (Ent.) 18(4):103-141, 3 pls.

♂ (territorial behavior), Nakhon Nayok, Thailand.
♂, Nakhon Nayok, Thailand.	♂, Phetchabun, Thailand.

1999.07.18 - 2023.07.31.