Help with ID of Nacaduba sp

[DaveChiangMai]

Two different butterflies, which I assume are Nacaduba species. Both photographed in mid elevation forest (500 metres) in Nan province, northern Thailand. Very grateful for pointers to identify them.

Image 1.
25020

Image 2.
25018

[Psyche]

1. Male Nacaduba hermus .

2. Male Nacaduba hermus.


Both have only two FW bands (excluding the submarginals) & thus 4-lines blue.

The 4-lines blues may be ID'ed thus.


1 N. pavana: Bands with strong inner dark striae ;HW black spot strongly dusted with metallic blue scales.
https://wingscales.com/content/record/408-1-eb597.jpg

2. N. sanaya : Without inner dark striae or barely ;HW postdiscal band & submarginals in space 4 & 5 well separated (not always) .FW band dislocated at vein 6 ;HW black spot barely with blue scales.
http://1.bp.blogspot.com/-XEY63bA0JPA/UrRJN5MTKUI/AAAAAAAAM-8/MvgQVQTQHKk/s1600/HFH_0286+Nacaduba+sanaya+elioti.jpg
https://wingscales.com/content/record/410-1-e0bfc.jpg

3. N. hermus; Inner dark striae weak; HW postdiscal spots & submarginals usually close in space 4 & 5 (not always) ; FW band barely dislocated; HW black spot with blue scales.
http://www.ifoundbutterflies.org/media_images/2015/127_6615-151-5566dd9595f3a-1.jpg (wrong image corrected.)
http://www.ifoundbutterflies.org/media_images/NacadubaHermus/NacadubaHermus_HemantOgale_ah293.jpg

N. subperusia lysa.Prodably not in N. Thailand; HW postdiscal band & submarginal always close ;inner dark striae absent ; black spot without blue scalings;FW band not dislocated.
http://3.bp.blogspot.com/-CCzm1ZlQsQE/UrRNXf_V1vI/AAAAAAAAM_c/083nczhETzE/s1600/HFH_0013+Nacaduba+subperusia+lysa.jpg


TL Seow: Cheers.
PS. one more N. pactolus is recognised by its large squarish HW submarginal spot 6, & flattened out spots 4 & 5; the white striae tend to be broad & fuzzy; black spot always with blue scales.
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20pactolus%20odon/Nacaduba%20pactolus%20odon%202%20-%20Sunny.jpg
https://c1.staticflickr.com/9/8351/28231680314_088622f27d_b.jpg

[DaveChiangMai]

Thank you for the details. I now need to go check some of my older identifications.

[David Chan]

Dear Dr Seow,

Could all these 3 Nacaduba shot at Northern Thailand be N.pactolus?

25349

25350

25351


Thanks.

Best regards,
David Chan

[Psyche]

Yes, they are all N. pactolus.
They are the white lines broaden & HW submarginal spot 6 squarish, the rest with straight inner margins.

TL Seow:Cheers.

[David Chan]

Dear Dr Seow,

Thanks for the confirmation.

Best regards,
David Chan