There are eleven similar black & white Neptini butterflies in P. malaysia.
You generally need the upperside more than the underside as the important FW postdiscal spots in space 1b & the lower margin would be hidden by the HW at rest.
They may be divided into two groups.
Neptis group 1 in which spot 2 & 3 are more or less parallel to the submarginal spots.
Neptis group 2 in which the postdiscal spots runs obliquely to the submarginal spots.
Neptis clinia leuconata.
FW postdiscal spots in a regular row.
FW submarginal spots forms a regular curve at apex, ie not bent in.
HW discal band of uniform width.
Band enter the base of space 3 forming a small white triangle. CLInIA.png
Note 2nd image is that of Neptis clinioides.
Neptis leucoporos. Correction: Spots 2 &3 are equally large ,& so this cannot be N. leucoporos. FW spot 3 is very close to the submarginal spots; HW band not reaching the upper margin.
FW characteristically have a large spot 2, a smaller spot 1b & a even smaller spot at the lower margin.
Abdomen with a white band in line with the HW discal band.(diagnostic).