♂, Chanthaburi, Thailand.		♀, Chanthaburi, Thailand.
♂, Ranong, Thailand.		♀, Ranong, Thailand.
♂, Krabi, Thailand.		♀, Ranong, Thailand.
♂, Satun (Koh Tarutao), Thailand.		♀, Satun (Koh Tarutao), Thailand.
♂, Bolikhamxai, Laos.		♂, Phetchaburi, Thailand.

ON : Arhopala atosia jahara Corbet, 1941 OD : Proc. R. ent. Soc. Lond. (B)10(9):153. TL : Mergui. (♂, NHML) Distribution : S.Myanmar, Thailand, Laos, Cambodia, Vietnam, Langkawi. ● ssp.jahara ● ssp.malayana

[ THAILAND ]
Amblypodia atosia atosia ; Godfrey,1930 : 330. (Chonburi: Nong Yai Boo; Hup Bon; Nakhon Sri Thammarat: Ban Natawn)
Amblypodia atosia atosia ; Godfrey,1932a : 272. (P)
Narathura atosia malayana ; Evans,1957 : 94. (Siam / P)
Arhopala atosia jahara ; Pinratana,1981 : 80, pl.12, figs.12,♂(Un),13♀,14♂(Un). (Ranong; Trang)
Arhopala atosia malayana ; Pinratana,1981 : 80, pl.12, fig.15,♀. (Ranong; Trang)
Arhopala atosia jahara ; Seki,1986 : 12. (Ranong)
Arhopala atosia malayana ; Yamaguchi, Aoki & Akiyama,2005 : 54. (Ubon Ratchathani: Phu Chong Na Yoi)
Arhopala atosia malayana ; Yamaguchi & Aoki,2002 : 36, fig.104,♂. (Mukdahan: Ban Na Lak; Ubon Ratchathani: Phu Chong Na Yoi; Phu Hin Dang)
Arhopala atosia jahara ; Ek-Amnuay,[2007] : 608, pl.275, figs.L206a♀,♀(Un). (Ranong)
Arhopala atosia malayana ; Ek-Amnuay,[2007] : 608, pl.276, figs.L206b♂,♂(Un),♀,♀(Un). (Khao Phanom Bencha; Trang)
'Arhopala atosia malayana ; Les Day,2011-2022 : Samui Butterflies, fig.['♀'](Un). (Koh Samui)' (accessed: 2022.06.08)
Arhopala atosia malayana ; Ek-Amnuay,2012 : 640, pl.290, figs.L232,♂,♂(Un) ; pl.291, figs.L232,♀,♀(Un),♀(Un). (Ranong; Khao Phanom Bencha; Trang)
Arhopala atosia malayana ; Kimura et al.,2014 : 57, figs.♂,♂(Un)(Toong Slang Luang),♂,♂(Un)(Khlong Naka),♀,♀(Un)(Khlong Naka). (Toong Slang Luang; Khao Soi Dao; Krachin WF; Kaper WF; Ranong Hot Spring; Muang Shone; Kam Puan; Khlong Naka; Kao Luang; Ka Chong; Thaleban) (in part)
Arhopala atosia malayana ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, figs, Early Stages. (Sa Kaeo; Chanthaburi) (accessed: 2023.06.01)

[ LAOS ]
Arhopala atosia juhara [sic] ; Motono & Negishi,1989 : 73, pl.104, figs.B11,♀,B12,♀(Un). (Pakse: Ban Taran)
Arhopala atosia malayana ; Osada, Uémura & Uehara,1999 : 216, pl.114, figs.♂,♂(Un),♀. (Thakhek)
Arhopala atosia malayana ; Nimura & Wakahara,2005 : 46. (Namdhua; Thabeng)
Arhopala atosia malayana ; Nakamura & Wakahara,2012 : 53.
Arhopala atosia malayana ; Onodera,2022 : 84, pl.215, figs.♂,♂(Un),♀,♀(Un). (Bolikhamxai: Thabok; Savannakhet)

[ CAMBODIA ]
Arhopala atosia jahara ; Chartier & Kosterin,2022 : 122. (Koh Kong; Pursat)

[ VIETNAM ]
Narathura atosia malayana ; Inoué & Kawazoé,1965 : 357-358, pl.11, figs.87,♂,88,♂(Un). (Lam Dong: Djiring; Dong Nai: Trang Bom)
Arhopala atosia malayana ; Miyazaki, Saito & Saito,[2007] : 60, fig.L-76,♀. (Dong Nai: Thac Mai)
Arhopala atosia malayana ; Monastyrskii & Devyatkin,2015 : 60. (C: Lam Dong / S: Dong Nai; Tay Ninh)

[ THAILAND ]
Sa Kaeo : 2♂.

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Chanthaburi : 2♂ 5♀ (incl. photo).

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Trat : 1♂ 1♀.

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Phetchaburi : 1♂.

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Ranong : 7♂ 6♀.

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Krabi : 1♂.

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Nakhon Si Thammarat : 4♂ (incl. photo by A.Giudici).

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Trang : 1♂.

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Satun (Koh Tarutao) : 4♂ 6♀.

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[ LAOS ]
Bolikhamxai : 1♂.

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Sekong : 1♂

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The butterfly is locally common in montane forests at low to moderate elevations (Alt. 30 - 600m).
The populations in P.Thailand (excluding Pattani to Yala) and northwards have a broader forewing border and more shining blue ground color on the upperside than ssp.malayana. It seems intermediate between ssp.malayana and ssp.aria.
Les Day,2011-2022 recorded both Arhopala atosia and Arhopala lurida from Koh Samui, but these are only underside photos and cannot be distinguished. Therefore, I do not adopt these records.

Corbet, A.S.,1941 : A key to the Indo-Malayan species of Arhopala Boisduval (Lepidoptera: Lycaenidae)
Proc. R. ent. Soc. Lond. (B)10(9):149-183, figs.1-114.

Evans, W.H.,1957 : A Revision of the Arhopala Group of Oriental Lycaenidae (Lepidoptera: Rhopalocera).
Bull. Br. Mus. nat. Hist. (Ent.) 5(3):85-141.

♂, Nakhon Si Thammarat, Thailand. (photo by A.Giudici)	♂, Chanthaburi, Thailand.

2018.12.31 - 2023.06.30.