ID help for nacaduba

[itsmemei]

Dear Dr Seow, please help with the ID for this nacaduba. Is it N. sanaya or N. pavana?

https://live.staticflickr.com/65535/51346598307_80baa89a60_o_d.jpg

[Psyche]

It is most likely Nacaduba hermus swatipa.


There are quite anumber of 4line bliues recorded in Singapore which can be very difficult to ID.

N. pavana ( & russelli) both have strongly developed dark striae within the bands. HW black spot with metallic scales.
https://4.bp.blogspot.com/-PHJWYq36n14/TrSQ3V-fwBI/AAAAAAAAL9o/ULwf_Ju7LSk/s1600/NP_adult_01.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20pavana%20singapura/NP_adult_female_01.jpg
N. russelli is very rare & have the submarginal spots large.


N. sanaya elioti.
No dark striae. HW black spot have no metallic scales.
FW postdiscal band almost always dislocated at vein 6.
HW submarginal spots & postdiscal band/spots usually well separated (variable).
http://1.bp.blogspot.com/-XEY63bA0JPA/UrRJN5MTKUI/AAAAAAAAM-8/MvgQVQTQHKk/s1600/HFH_0286+Nacaduba+sanaya+elioti.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20sanaya%20elioti/jewel%204%20line%20blue%20-%20horace%20tan.jpg


N. sybperusia lysa. Dark striae absent.
HW submarginal spots in space 4 & 5always very close to the postdiscal spots/band.
HW black spot without metallic scales.
FW postdiscal band usually not dislocated.
http://3.bp.blogspot.com/-CCzm1ZlQsQE/UrRNXf_V1vI/AAAAAAAAM_c/083nczhETzE/s1600/HFH_0013+Nacaduba+subperusia+lysa.jpg
https://a4.pbase.com/g1/25/686825/2/129254158.Pp1lTxSM.jpg


Nacaduba hermus swatipa. Dark striae absent or nearly so.
FW postdiscal band usually not dislocated.
HW submarginal spots & postdiscal band in space 4 & 5 usually close but variable.
HW black spot with a few metallic scales. Important ID feature.
https://live.staticflickr.com/65535/47695214992_c981d68726_c.jpg
https://4.bp.blogspot.com/-EvYfAiVFYgQ/V0t61nHlERI/AAAAAAAAZ68/f1VbV4iq48sTWD0yjzPfbrHqrnpIdFitgCLcB/s1600/DSC_1760.JPG


N. pendleburyi. No pix.
Dark striae absent.
Submarginal spots narrow , so they & the postdiscal band are widely spaced.
Male upperside FW with narrow black border expanding at apex.


If you look carefully at the HW black spot, there are a few metallic scales.



TL Seow: Cheers.

[itsmemei]

Thanks for the detailed explanation!