ID help From Bangladesh

[Sabbir]

Dr. Seow Sir ,

Need Your Valuable Comment on this Specimen.

Thanks In Advance.

https://www.flickr.com/photos/126083431@N08/17275498944/in/dateposted-public/

Regards
Sabbir

[Psyche]

Male Polyura athamas ( or Charaxes athamas.)

The male of P. alphius agraria have two subapical spots.
http://www.flutters.org/home/html/photos.php?level=picture&id=1882

The males of both arja & athamas can be quite similar as ID is based largely on the upperside colour, greenish white in arja & pale yellow green in athamas.

The typical arja has a broad band , the outer margin is parallel to the termen. A line drawn upwards will incorporate most of the large discal spot within it. The discal spot also tends to be rectangular.
The wingshape is less sharp & the termen less concave.
However the band varies & narrow band forms resembles athamas closely except in colour & wingshape.
http://yutaka.it-n.jp/cha/60090001.html
http://www.ifoundbutterflies.org/sp/872/Charaxes-arja

The band in athamas also varies but never as broad as in arja.
The FW is sharper & more angulate & the termen is strongly excavated (concave).
The outer margin of the FW band which follows the termen cut inwards & a drawn line upwards tend to exclude most of the discal spot.
The discal spot is usually quadrate or rounded.
http://yutaka.it-n.jp/cha/60080001.html
Two examples in the link below are probably arja.
http://www.ifoundbutterflies.org/#!/sp/571/Charaxes-athamas

The individual here shows all the characters of P. athamas ,including a strong yellow tinge to the band.

DNA studies indicate all Polyura are merely a species group in Charaxes with 2 close relatives in Africa under Charaxes.
However, there does not seem to be a consensus yet.

TL Seow :Cheers.

[Sabbir]

Thanks a lot Seow Sir.

regards
Sabbir