IDs help needed!

1 & 3. Caltoris cormasa.
1 male, 3- female.
The reddish tone of the brown is a guide.

2. Erionota thrax male.

E. thrax & torus. males have the antennal club 2/3 - 3/4 white above. In the female it is half white.
HW band is broad with little narrowing.

E. thrax FW margin straight.
Male.
https://wanderingbutterflyeffect.fil...0f3c25860d.jpg
Females ;FW margin may be slightly curved. Apex more acute than female torus.
https://www.ifoundbutterflies.org/me...unte_ag436.jpg
https://thaibutterflies.com/wp-conte...x-1080x675.jpg
http://yutaka.it-n.jp/hes/92330001.html

E. torus FW curved or convex, the degree is variable making it diificult to judge in the female.
In China & South India the FWs are more rounded.
https://a4.pbase.com/g6/98/670198/2/...8.2B9wFlm4.jpg
https://live.staticflickr.com/2402/2...9872afe5_b.jpg

Male.
https://www.ifoundbutterflies.org/me...0bca131e-1.jpg
Female.
http://www.butterflycircle.com/check...2012--0882.jpg
http://yutaka.it-n.jp/hes/92320001.html

E. acroleuca apicalis.Male antennal club wholly white above, female half white.
FW margin straight.
HW band constricted & narrowed in upper half.
Male
http://www.butterflycircle.com/check...nny%20Chir.jpg
Female.
https://2.bp.blogspot.com/-oGOIfwCnq..._female_01.jpg

4, Pelopidas mathias male.

P). mathias grey tinged ground colour uneven.
Male, female.
https://3.bp.blogspot.com/-NQjrfm7_w...enedict_01.jpg
http://www.butterflycircle.com/check...hee%20Ming.jpg

P. agna. Not grey tinged. Ground colour evenly brown.
Male, female.
http://3.bp.blogspot.com/-Hw681ALm5F...ded+Swift+.jpg
http://www.butterflycircle.com/check...SwiftF-KSK.jpg

TL Seow: Cheers.