♂, Satun, Thailand.		♀, Satun, Thailand.
♂, Satun, Thailand.		♀, Satun, Thailand.
♂, Satun, Thailand. (photo by A.Giudici)		♂ genitalia, Satun, Thailand.

ON : Plastingia helena Butler, 1870 OD : Trans. ent. Soc. Lond. 1870(4):511. TL : Sarawak, Borneo. (♂, NHML) Distribution : P.Thailand (Satun), W.Malaysia, Borneo, Sumatra, Banka.

[ THAILAND ]
Pyroneura helena natuna ; Pinratana,1985 : 81, pl.27, figs.171,♂,♀. (no loc.)
Pyroneura natuna ; Ek-Amnuay,[2007] : 800, pl.367, fig.H200,♂. (Thale Ban)
Pyroneura natuna ; Kimura et al.,2011 : 80, figs.♂,♂(Un),♀,♀(Un). (Thaleban)
Pyroneura natuna ; Ek-Amnuay,2012 : 858, pl.396, fig.H198,♂. (Thale Ban)

[ THAILAND ]
Satun : 7♂ 3♀.

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The butterfly is locally not rare in montane forests at low elevations (Alt. 30 - 150m). Both sexes visit flowers.
This taxon and two others, Pyroneura natuna and Pyroneura flavia, have been confused. Their distribution records need to be reconfirmed.

Butler, A.G.,1870 : Descriptions of some new dirunal Lepidoptera, chiefly Hesperiidae.
Trans. ent. Soc. Lond. 1870(4):485-520.

Maruyama, K.,1991 : Butterflies of Borneo vol.2, No.2. Hesperiidae, Addndum of vol.1.
XII+89 pp(Japanese text), 48 pls, XII+83 pp (English text) + 1.
Tobishima corporation. Tokyo, Japan.

♂, Satun, Thailand. (photo by A.Giudici) 2017.12.31 - 2023.09.30. A Check list of Butterflies in Indo-China, Chiefly from THAILAND, LAOS & VIETNAM. Copyright © 1996- Y.Inayoshi.