My first post from Tripura,India...

[Psyche]

Both are Pithauria sramineipennis.

The difficulty in India is th varied forms with DSF thrown in.
Elsewhere in SE Asia they are not difficult to separate.

P. stramineipennis
UpF with broadly straw-coloured scales basally.
UnF with a large pale area sub-basally in the lower zone, intruding into the cell area around the cellspots. (Diagnostic).
UnH like Halpe, with diffuse interneural dark spots delineating a series of pale lunulate postdiscal spots.
DSF merely pale & unmarked,
http://yutaka.it-n.jp/hes/91430001.html
Typical WSF Thailand.
https://www.pamsbutterflies.com/butt...tramineipennis

https://www.ifoundbutterflies.org/sp...tramineipennis


P. marsena.UpF without extensive straw-coloured scales.
UnF without a pale area.
UnH with a more uniform ground pattern (without interneural spots) typically chestnut with some white discal spots.
http://www.flutters.org/home/photoga...picture&id=409
https://www.ifoundbutterflies.org/sp...hauria-marsena
http://yutaka.it-n.jp/hes/91450001.html


P. murdava. UnH more uniformly dark brown.
https://thaibutterflies.com/project_...auria-murdava/
https://www.ifoundbutterflies.org/sp...hauria-murdava



TL Seow: Cheers.

[ButterflyWitch]

Thanks a lot sir...