In my photo collection there are a number of Neptis specimen from Sri Lanka, Thailand and Vietnam that I tentatively labeled as Neptis hylas.
However, I doubt if they are all correctly identified, in particular the one (no. 4) seen in Vietnam.
Would very much appreciate your opinion.

1. Neptis hylas?
Wellawaya, Sri Lanka, Jan 2013
web1130782.jpg

2. Neptis hylas?
Kaeng Krachan NP, Thailand, Feb. 2016
web35879.jpg

3. Neptis Hylas?
Ban Sang Sian, Prachinburi Province, Thailand, Jan. 2017
web47991.jpgweb47993.jpg

4. Neptis sp.
Dalat, Vietnam, Jan. 2019
web80419.jpg

Thanks in advance.
Cheers,
David