Help with butterfly ID

[Samuel T]

Dr Seow, appreciate your help to ID this butterfly. Thanks.

Regards
Samuel

[Psyche]

Male Borbo cinnara.
Example like this can be difficult.
Noted features.
HW without a central cellspot.
Visible spots are spot 2, 3, 4 (white) & 6 (hyaline) hard to see.

Borbo cinnara can be recognised by its white face & upper chest.
Thoracic hair are more greenish.
Typically with three spots, spots 2, 3, & 6.
http://3.bp.blogspot.com/-f9av3xsB2GQ/U15qP0JKwvI/AAAAAAAAdT8/MFG7tbvS-NU/s1600/FS_female_adult_unds_01_c.jpg
http://2.bp.blogspot.com/-KaVjdL_FAME/U152N_2DObI/AAAAAAAAdUc/5BJKeJq6wCY/s1600/FS_adult_Khew_01.jpg
http://farm9.static.flickr.com/8649/15850028609_193282d096.jpg
http://www.ifoundbutterflies.org/media_images/BorboCinnara/BorboCinnara_KSaji_ad957.jpg

Pelopidas mathias. With HW cellspot; face & upper chest less white.
http://2.bp.blogspot.com/_0EK80AsaR7g/S1sg6OwEETI/AAAAAAAACU0/OatvAsaSIg0/s400/DSC2581-Short-Branded+Swift.jpg

Polytremis lubricans. HW without a cellspot; face & chest ochreous as the wings.
http://1.bp.blogspot.com/-0cUzxS0FpT8/T1tgyU4WJrI/AAAAAAAAFjg/TiwxZzRsxec/s1600/DSC4674%2BContiguous%2BSwift.jpg


TL Seow: Cheers.
PS. Parnara bada which is also found in Singapore can be confusingly similar in a worn state.
The antennae are short & stubby; the HW spots varies in number; a cellspot may be present at the lower end of the cell (different from that in Pelopidas) ;subapical spots often two.
http://3.bp.blogspot.com/-FX2pIhZeZ4o/Ti7bGs5kmQI/AAAAAAAAEfg/CCaC5j5CAA8/s400/DSC0947%2BContiguous%2BSwift.jpg
https://static.inaturalist.org/photos/2464963/large.jpg?1443780933
http://2.bp.blogspot.com/-r10tmE1ODKA/UPa4h8TT-8I/AAAAAAAAIw0/fRcHm9s-F9M/s1600/LKW+2009+parnara+bada.jpg