All the species except A. phidippus have the HW 4th band notched to a varying degree.
It is most variable in A. friderici in which the notching may be minimal as shown in the example below.
http://lithops.com.ua/index.php?rout...roduct_id=1781
In A. masina the notching is usually quite strong.
Males.
http://www.samuibutterflies.com/02_i...namalaya.v.jpg
https://pds.exblog.jp/pds/1/201205/0...6_21342975.jpg
female
http://yutaka.it-n.jp/ama/50310010.html
TL Seow: Cheers.