♂, 2014.06.27. Surat Thani (Koh Samui), Thailand.		♂ genitalia, Surat Thani (Koh Samui), Thailand.

ON : Horaga albimacula malaya Corbet, 1941 OD : Proc. R. ent. Soc. Lond. (B)10(3): 48-49. TL : Singapore. (NHML) Distribution : Thailand (Koh Samui), Langkawi, Singapore.

Holotype ♂, 04.Apr.1936, Singapore. J.N.Eliot (NHML, photo examined.)
Allotype ♀, 11.Dec.1937, Blakang Mati, Singapore. J.N.Eliot (NHML) ; Eliot,1992 : pl.61, fig.19,♀.

[ THAILAND ]
Horaga chalcedonyx malaya ; Les Day,2014-2022 : Samui Butterflies, fig.[♂](Un). (Koh Samui) (accessed: 2022.07.30)
'Horaga albimacula ssp? ; Les Day,2014-2022 : Samui Butterflies, fig.[♂](Un). (Koh Phangan) (accessed: 2022.07.30)'
Horaga chalcedonyx ssp. ; Saito & Inayoshi,2018 : 35, figs.79,♂,♂(Un). (Koh Samui)

[ THAILAND ]
Surat Thani : Koh Samui dist., 2014.06.27. 1♂, L.Day (YI)

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The species was found by Les Day on 27.Jun.2014 in Koh Samui and this is the only known specimen in Thailand. The upperside is the same as ssp.malaya, but the discal band on the UnH is outwardly wide greenish silvery-edged and darker ground colour. I tentatively treat it as ssp.malaya, but further taxonomic study is needed.
There are some other photo records from Koh Phangan as 'Horaga albimacula ssp.?'. However, these are likely to be this taxon. The species can only be distinguished from Horaga albimacula by an examination of the male genitalia. Further taxonomic and distributional studies with specimens are needed.

Corbet, A.S.,1941 : A Revision of the Malayan Species of Horaga Moore. (Lepidoptera: Lycaenidae).
Proc. R. ent. Soc. Lond. (B)10(3): 46-50.

Eliot, J.N.,1992 : In Corbet & Pendlebury. The Butterflies of the Malay Peninsula, edn. 4.
Malayan Nature Society, Kuala Lumpur.

Eliot, J.N.,1986 : The Horaga albimacula Complex (Lepidoptera, Lycaenidae).
Tyô to Ga 36(3): 107-111.

♂, Surat Thani (Koh Samui), Thailand. (photo by L.Day)

2019.12.31 - 2024.06.30.