For no. 1 I leave it as A. athada.. I have look at it several times but can't explain the dull dark purple colour.
The profile shot means the butt is perpendicular to the camera.
All other Arhopala shot this way have a noticeable blue colour.
No 2 is probably female as the bulging abdomen indicate. The off-focus end look like a male.
Now the Milrtus you have shot is also interesting.
The 4 recorded species in Singapore are M. biggsii, symethus, gopara, & gaesa.
Note the three subapical spots are spot 4, 5, & 6, At t6he top of spot 6 is a small one in space 7 (not in space 9 as in Arhopala).
There are 3 costal spots spot 9, 10, & 11.
M. biggsii; FW spot 6 shifted out of line from spot 4 & 5.
Male.
http://www.butterflycircle.com/check...%20biggsii.jpg
eg females.
https://wanderingbutterflyeffect.fil...e9e02a000b.jpg
http://www.butterflycircle.com/check...20-%20bene.jpg
M. gopara ;FW spot 6 almost in line. Female more prominent 'tailed.
https://en.wikipedia.org/wiki/Miletu...raMUpUnAC1.jpg
female.
http://v3.boldsystems.org/pics/BOPMB...1341158498.JPG
M. gaesa ;FW spot 6 in line with spot 4 & 5; HW often with stronger tornal shading.
M. symethus.FW spot 6 almost in line; spots poorly defined ; whitish shading of apices of both wings.
female.
http://www.butterflycircle.com/check...562-copy-4.jpg
Are there examnples in the past.
Possible female M. gopara. The tail varies ;This one has it longer than the M. biggsii female.
http://photobucket.com/gallery/user/...LmpwZw==/?ref=
Probable Female M. gaesa.
Spot 6 is virtually in line with spot 4 & 5.
The tornal shading may not be an ID feature. (image in Fleming has this).
http://www.butterflycircle.com/check...llen%20Tan.JPG
Your pix also suggest male M. gaesa or M. gopara since FW spot 6 is in line with spot 4 & 5.
(if the tornal shading is an ID feature than it is closer to M. gopara.)
TL Seow: Cheers.