♂, Ranong, Thailand.		♀, Ranong, Thailand.
♂, Oudomxai, Laos. (photo by H.Onodera)		♀, Phetchaburi, Thailand.

ON : Plesioneura nigricans Nicéville, 1885 OD : J. asiat. Soc. Bengal, Part II. 54(2):123, pl.2, fig.6,♀. TL : Sikkim (♀, NZC). Distribution : Nepal, Bhutan, Sikkim to Myanmar, Thailand, Laos, Vietnam, W.Malaysia.

♀ Type, 9.May.1884. Sikkim. (NZC) ; Sheela et al.,2019 : 14, figs.♀,♀(Un).

[ THAILAND ]
Celaenorrhinus nigricans nigricans ; Godfrey,1930 : 359. (W: Me Lamoung)
Celaenorrhinus nigricans nigricans ; Godfrey,1932a : 274. (Ranong: Kapor)
Celaenorrhinus nigricans nigricans ; Evans,1949 : 101. (W)
Celaenorrhinus nigricans nigricans ; Pinratana,1985 : 28, pl.11, figs.38,♂,♀. (Chanthaburi; Surat Thani)
Celaenorrhinus nigricans nigricans ; Ek-Amnuay,[2007] : 752, pl.345, figs.H50,♂,♂(Un). (Chanthaburi)
Celaenorrhinus nigricans nigricans ; Kimura et al.,2011 : 34, figs.♂,♂(Un),♀,♀(Un). (Kao Soi Dao; Muang Shone)
Celaenorrhinus nigricans nigricans ; Ek-Amnuay,2012 : 800, pl.368, figs.H48,♂[♀],♂[♀](Un). (Chanthaburi)
Celaenorrhinus nigricans nigricans ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2015- : Butterflies of Thailand, figs., Early Stages. (Phetchabun; Nakhon Nayok) (accessed: 2023.05.01)

[ LAOS ]
Celaenorrhinus nigricans nigricans ; Masui & Uehara,1995 ; 5, pl.2, figs.15,♂,16,♀. (Saravan)
Celaenorrhinus nigricans nigricans ; Osada, Uémura & Uehara,1999 : 221, pl.134, figs.♂,♀. (Thateng)
Celaenorrhinus nigricans nigricans ; Nakamura & Wakahara,2012 : 57.
Celaenorrhinus nigricans nigricans ; Onodera,2022 : 104, pl.240, figs.♂,♂(Un). (Oudomxai)

[ VIETNAM ]
Celaenorrhinus nigricans nigricans ; Devyatkin & Monastyrskii,1999 : 159. (N: Ba Be)
Celaenorrhinus nigricans nigricans ; Miyazaki, Saito & Saito,2007b : 6, figs.H-18,♂,♀. (Lam Dong: Dambri)
Celaenorrhinus nigricans nigricans ; Monastyrskii & Devyatkin,2015 : 72. (N / C)

[ THAILAND ]
Chiang Rai : 1♂.

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Phetchabun : 2♀ (photo).

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Tak : 1♀.

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Nakhon Nayok : 2♂ (photo by T.Aomaya).

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Phetchaburi : 1♀.

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Ranong : 1♂ 2♀.

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

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The butterfly is locally not rare in montane forests at low to moderate elevations (Alt. 300 - 1200m). They often fly out from bushes along the trail and rest on the underside of leaves with their wings spread.

Nicéville, L. de,1885 : Descriptions of some new Indian Rhopalocera.
J. asiat. Soc. Bengal, Part II. 54(2)117-124, 1 pl.

♀, Phetchabun, Thailand.	♀, Phetchabun, Thailand.

1999.07.31 - 2024.06.30.