Post 13.
They are both correct.
1. The silverstreak on the FW characteristic.
2. The paler forms of Arhopala alitaeus are often confused with pseudomuta.
A. alitaeus : darker, more contrasted & often purple-washed.
HW postdiscal spot 6 is more broadly rounded; submarginal spots are almost separate lunules (half-moons).
http://www.butterflycircle.com/check...le_Chng_02.jpg
http://farm6.static.flickr.com/5165/...37e569f7_b.jpg
A. pseudomuta ;Typically pale with poorly contrasted markings but some are darker causing confusion with A. alitaeus.
HW postdiscal spot 6 is more quadrate (squarish) & smaller ; submarginal spots are 'flatter' forming a running band.
http://www.butterflycircle.com/check...-%20Horace.jpg
http://www.butterflycircle.com/check...1---Horace.jpg
TL Seow: Cheers.