♂, Chiang Mai, Thailand.		♂, Chiang Mai, Thailand.
♂, Nan, Thailand.		♂, Chiang Mai, Thailand.
♂, Phrae, Thailand.		♂, Chanthaburi, Thailand.

ON : Nacaduba angusta f. albida Riley & Godfrey, 1925 OD : Entomologist 58: 141, pl.3, fig.2,♂. TL : "Phar Mieng, N.Siam [N.Thailand]". (NHML) Distribution : Myanmar, Thailand, Laos, Vietnam. ● ssp.albida ● ssp.kerriana

[ THAILAND ]
Nacaduba angusta kerriana ; Godfrey,1930 : 320-321. (Chonburi: Hup Bon)
Nacaduba angusta f.albida ; Godfrey,1930 : 321. (Chiang Rai: Phar Mieng)
Nacaduba angusta kerriana ; Pinratana,1981 : 60, pl.10, figs.8,♀,9,♂(Un) ; pl.35, figs.13,♂,14,♀,18,♂(Un),19,♀(Un). (Chaiyaphum; Chanthaburi; Nakhon Ratchasima) (in part)
Nacaduba angusta albida ; Pinratana,1981 : 60. not fig. (Chiang Mai)
Nacaduba angusta kerriana ; Ek-Amnuay,[2007] : 578,580, pl.262, figs.L128a♂,♂(Un),♂,♂(Un). (Lamphun)
Nacaduba angusta albida ; Ek-Amnuay,2012 : 602, pl.272, figs.L153a♂,♂(Un),♂,♂(Un). (Lamphun)
Nacaduba angusta albida ; Kimura et al.,2014 : 156, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un),♀,♀(Un),♀,♀(Un). (Thung Saleng Luang; Phu Khiewo; Kao Soi Dao; Kao Khiewo)
Nacaduba angusta albida ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2023- : Butterflies of Thailand, figs. (Chiang Mai; Sa Kaeo) (accessed: 2023.04.22)

[ LAOS ]
Nacaduba angusta ssp. ; Motono & Negishi,1989 : 72, pl.102, fig.B6,♀(Un). (Luang Prabang; Phatong; Vientiane)
'Nacaduba angusta albida ; Osada, Uémura & Uehara,1999 : 215, not fig. (list only)'
Nacaduba angusta albida ; Nakamura & Wakahara,2012 : 52.
Nacaduba angusta albida ; Miyamoto & Nakamura,2016 : 24, figs.12A♂,B♂(Un). (Bolikhamxai; Champasak)
Nacaduba angusta albida ; Onodera,2022 : 81, pl.211, figs.♂,♂(Un),♀,♀(Un). (Khammouan: Nahin)

[ VIETNAM ]
Nacaduba kerriana angusta ; Metaye,1957 : 90. (no loc.)
Nacaduba angusta albida ; Miyazaki, Saito & Saito,2006d : 56, figs.L-49,♂,♀. (Lam Dong: Gung Re)
Nacaduba angusta albida ; Monastyrskii & Devyatkin,2015 : 53. (C / S: Binh Phuoc)

[ THAILAND ]
Chiang Mai : 11♂ (incl. photo).

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Phrae : 1♂.

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Nan : 2♂.

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Loei : 1♂.

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Tak : 1♂.

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Kanchanaburi : 1♂.

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Chanthaburi : 1♂.

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The butterfly is locally not rare in montane forests at low to moderate elevations (Alt. 350 - 1300m). Males are territorial on trees at hilltops and frequently come to the banks of streams and puddles to suck water.
The white patch on the upperside of the male is very variable. Some specimens lack it.

Riley, N.D. & Godfrey, E.J.,1925 : New Rhopalocera from Siam and Hainan.
Entomologist 58: 140-143, pl.3.

Tite, G.E.,1963 : A Synonymic List of the Genus Nacaduba and Allied Genera (Lepidoptera: Lycaenidae).
Bull. Br. Mus. nat. Hist. (Ent.) 13(4): 69-116, 91 tf, 2 pls. London.

♂, Chiang Mai, Thailand.	♂, Chiang Mai, Thailand.
♂, Chiang Mai, Thailand.	♂, Chiang Mai, Thailand.

1999.07.11 - 2023.05.31.