ID request - Langkawi - by SL Liew - Dec 13, 2025

[SL Liew]

Hi Dr.. Seow,
Requesting your help to id these recent observations at Lubok Semilang, Langkawi on Dec 9, 2025

#1A Grass Skipper?
https://www.inaturalist.org/observations/330166140

#1B Grass Skipper?
https://www.inaturalist.org/observations/330242455

#1C Grass Skipper?
https://www.inaturalist.org/observations/330242459

#2 Dacalana?
https://www.inaturalist.org/observations/330242472

#3A Euploea?
https://www.inaturalist.org/observations/330242826

#3B Euploea?
https://www.inaturalist.org/observations/330242831

#3C Euploea?
https://www.inaturalist.org/observations/330312590

#4 Euploea?
https://www.inaturalist.org/observations/330312601

#5 Lascar?
https://www.inaturalist.org/observations/330312614

#6 Arhopala?
https://www.inaturalist.org/observations/330312611

#7 Arhopala?
https://www.inaturalist.org/observations/330312612

#8 Arhopala?
https://www.inaturalist.org/observations/330242689

#9 Arhopala?
https://www.inaturalist.org/observations/330242686

#10 Arhopala?
https://www.inaturalist.org/observations/330165637

#11 Tanaecia?
https://www.inaturalist.org/observations/330312584

#12 Grass Skipper?
https://www.inaturalist.org/observations/330312586


Cheers, SL Liew

[Psyche]

1 A. https://www.inaturalist.org/observations/330242459
Male Isma iapis
Note in pic 7 (last) the dark tornal hairs appear as a triangular tuft.

1B. https://www.inaturalist.org/observations/330242455
Pix 1 and 2 male.
Note black fuzz at abdominal end.
Pix 3 and 4 Probable mixup.
Probable female.. note bulging abdomen with pinted tip.


1C. https://www.inaturalist.org/observations/330166140
Pic 1 female.
Pic 3 mixed up with pix 3 & 4 of 1B.
The rest uncertain mixedup.
However all are Isma iapis.



Isma iapis iapis.
Antennal club mostly white below. May appear as a small dot in lateral or top view.
Subpical typical two, lower spot 5 larger.
Cellspot two, lower much larger (wider), aligned with spot 2.
UnF space 1b large white ,much more in the female.
UnH ochreous with vague dark spots.
Male only with long tornal dark hairs.
https://yutaka.it-n.jp/hes/91880001.html

Males.
https://www.gbif.org/occurrence/2847175578
https://www.gbif.org/occurrence/2847175573
Females.
https://www.gbif.org/occurrence/2847175599
https://www.gbif.org/occurrence/2847175581


Isma protoclea. Very similar species but underside darker purplish brown
Male and female.
https://www.gbif.org/occurrence/2456362391
https://www.gbif.org/occurrence/2847175557

TL Seow: Cheers.

[Psyche]

2. https://www.inaturalist.org/observations/330242472
Dacalana burmana.

D. burmana is the only species recorded from Langkawi.

It is usually recognisable because the orange ring is small, and the postdiscal spots are usually strongly lunulate ie like crescent moons.
Males.
https://www.gbif.org/occurrence/2847202273
https://www.gbif.org/occurrence/2847202289

TL Seow: Cheers.

[Psyche]

3A.https://www.inaturalist.org/observations/330242826
3B.https://www.inaturalist.org/observations/330242831
3C.https://www.inaturalist.org/observations/330312590
Very likely Euploea eyndhovii.

The two species are impossible to separate from their markings in the male.
The individual variations appear infinite.

Euploea doubledayi.
Larger FW 50-55mm about 1.5X larger.
Male FW apex slightly more acute, sharper.
Male UpF with a dark blue gloss, & so may appear partly blue-black in a sidelight.
Female UpF with several white discal spots.
Males females from Langkawi.
https://www.gbif.org/occurrence/2847206086
https://www.gbif.org/occurrence/2847205488
https://yutaka.it-n.jp/dan/30640010.html


Euploea eyndhovii.
Smaller FW 40-45mm.
Male with FW apex more broadly rounded.
Male UpF dark brown wiyhout a dark blue gloss.
Female UpF plain brown without any white spot.
Males from Langkawi.
https://www.gbif.org/occurrence/2847207510
https://www.gbif.org/occurrence/2847207513
Female from Singapore.
https://www.gbif.org/occurrence/2847205515
https://yutaka.it-n.jp/dan/30660010.html

[Psyche]

4. https://www.inaturalist.org/observations/330312601
Female Euploea klugii.

Of the 4 species with apical white spots only E. klugii have the FW space 2 and 3 largely free of submarginal and postdiscal spots.
https://yutaka.it-n.jp/dan/30780010.html
https://yutaka.it-n.jp/dan/30580030.html
https://yutaka.it-n.jp/dan/30520010.html
https://yutaka.it-n.jp/dan/30740010.html



5. https://www.inaturalist.org/observations/330312614
Too blurred to id.

[Psyche]

6.https://www.inaturalist.org/observations/330312611
Likely Arhopala pseudomuta.

the markings are that of the alitaeus group.
The dull tone suggest A. pseudomuta although the ssp in Langkawi is darker & slightly purple-washed.
https://yutaka.it-n.jp/lyc4f/82010010.html
https://www.gbif.org/occurrence/2847203464
A. ariana is darker and pink=washed on the underside.
It is also much rarer.
https://yutaka.it-n.jp/lyc4f/82020010.html
https://www.gbif.org/occurrence/2847202441



7.https://www.inaturalist.org/observations/330312612
Unknown. Too dark.



8. https://www.inaturalist.org/observations/330242689
The pattern is very hard to discern but seem to suggest the atosia group.
The better contrasted spots suggest Arhopala lurida.
A. lurida
https://yutaka.it-n.jp/npict14f/81820001_n001.jpg
A. atosia have very poorly contrasted markings.
https://wingscales.com/Lycaenidae/Arhopala-atosia-jahara




9. https://www.inaturalist.org/observations/330242686
10. https://www.inaturalist.org/observations/330165637

Both are members of the amphimuta group.
There is a faint white tornal spot better seen in some shots.

A. moolaiana or norda.
A. norda is much rarer, the male UpF have a thich border as in A. major.

A. moolaiana is the likely ID.
https://yutaka.it-n.jp/lyc4f/81910020.html
https://wingscales.com/Lycaenidae/Arhopala-moolaiana-yajuna

[Psyche]

11, https://www.inaturalist.org/observations/330312584
Tanaecia flora.


T. godartii.
FW and HW blue bands narrow and aligned well at rest, the margins regular.
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhn2e5m9u-A_EChEmmpBNyC0mxxu7gSt8BIEXVm1ifuwsoCcAPZOHtzMWxlq fLvU1jabUGPZHnFBdfu_Z2VEOoYd62_96s1ibj-CDi0z3QGyPFZmI97L1YIuEzrNK_Kwv61bQ8EtJfzRis/s1600/DSC_5129.JPG
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgjqJdfliePuu_IxW5IrRbDfMMrt2L2vRREx6A2JA7As4 jyxevv8k71TxsvXEBLA0Sz31-LM3r4dgFvIcVZK-7-7xlKeXpuPwxAbq8qzw94TenJy3c0Jf9j4uc4LUvb_1WuAC4NdN 0CGEg/s1600/DSC_0106.JPG


T. flora
FW and HW blue bands broader, their inner margins somewhat irregular but aligned at rest.
HW blue band tapers upward strongly.
https://inaturalist-open-data.s3.amazonaws.com/photos/37747868/original.jpg
https://lh3.googleusercontent.com/proxy/UxP1nsNceaUylXYK1Q7QxWj0jlXH01RudwVnn3Kq6cPFk1bNc2 iov4R_bpy8k8b6MObD4EjG4zUYjsEGDR9V3pieQKtbYSRRgHlp gw4bHj6Owto


T. iapis (= cocytina)
Blue bands inner margins often very irregular and usually nevr align at rest.
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1Gc90MnMsaEuRSLSJ_Ql4Yo1JVOYrK1-r_vdkFCIl-1eA_JOKvcNlhMd5KpU8YsJ7a6gIsoZ0Z8qhy8q40jphhcdKu9-AMlCWtQ-kfutcZiuU2rmlAT3Dpjtc2SWGbVKcJkkX-BUcB1E/s1600/Horsfield'sBaron-SunnyC.jpg
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQmgLlPSw-XRCMPXEnNPaN3rBGbvpZcYjjpYA&s
https://www.butterflycircle.com/checklist/mugshots/Tanaecia%20iapis%20puseda/Horsfields%20Baron%20-%20Mark.jpg

[Psyche]

12. https://www.inaturalist.org/observations/330312586

Likely to be Isma bononia.

The white antennal clubs and the FW markings suggest this species.
Underside ground ochreous.
https://yutaka.it-n.jp/hes/91990001.html

Very similar, I. bononiodes.
Undersdie brown.
https://thaibutterflies.com/Butterflies/isma-bononoides/


TL Seow: Cheers.

[SL Liew]

Thanks so much Dr. Seow. Appreciate very much your ids.

Cheers, SL Liew