ID help needed (29 June 2022)

[Blue Nawab]

Dear Dr Seow, Pls help with the following ID, thank you!

27679

[Psyche]

Male Nacaduba berenice. Correction : Nacaduba hermus.

The two smaller 6-line blues, N berenice & calauria can sometimes be difficult to ID.
There are probably hybrids causing intermediates.

N. caluria; FW postdiscal band almost always straight, & unbroken.
There should not be any dislocation ie. breaks in the white striae forming the margins of the band.
FW only submarginal spots 4 & 5 pointed, somewhat triangular or haert-shaped.
All valid examples.
Pairs male on the right.
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20calauria%20malayica/Nacaduba_calauria%20-%20Henry%20Koh.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20calauria%20malayica/Nacaduba%20calauria%20-%20Ellen%20Tan.JPG
https://2.bp.blogspot.com/--p2l06_9HfA/XJ8tPcR0L7I/AAAAAAAAW1A/zBMbt7Zekfg3Vt6AkF55pLoRkKssl4MWgCLcBGAs/s640/IMG_20190330_094239.jpg
https://wanderingbutterflyeffect.files.wordpress.com/2009/03/6a0100a801ee89000e011017b3ad98860e.jpg
https://inaturalist-open-data.s3.amazonaws.com/photos/141702644/large.jpeg
https://inaturalist-open-data.s3.amazonaws.com/photos/141702659/large.jpeg
http://yutaka.it-n.jp/lyc4/81280010.html



N. berenice.
Variable. Typically some dislocation of FW postdiscal band ,usually mid at vein 4 or at vein 3 or 5.Also often rather crooked.
https://inaturalist-open-data.s3.amazonaws.com/photos/206484594/large.jpg
https://inaturalist-open-data.s3.amazonaws.com/photos/206484608/large.jpg

https://inaturalist-open-data.s3.amazonaws.com/photos/183509959/large.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20berenice%20icena/Rounded%206%20Line%20Blue%20-%20Fedrick%20Ho.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20berenice%20icena/Rounded%206%20Line%20Blue%20-%20Neo%20Chee%20Beng.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20berenice%20icena/154%20Nacaduba%20berenice%20icena%20(Rounded%206-Line%20Blue)%20Bobby%20Mun.jpg
http://yutaka.it-n.jp/lyc4/81260020.html




TL Seow: Cheers.

[Blue Nawab]

Dear Dr Seow,
There's only four line, probably should be Nacaduba pactolus odon instead of berenice? Thanks.

[Psyche]

Oops!
I was too preocupied with 6line blues.Once I opened the answer box, I can not see the image again until I finished the reply.

This is Nacaduba hermus.
Resembles N. sanaya but the FW postdiscal band is generally unbroken, & there is always some metallic blue scales in the HW tornal black spot.
http://nlliew66butterflies.blogspot.com/2017/02/nacaduba-hermus-swatipa-corbet.html


N pactolus looks similar but HW submarginal spot 6 is very angular , while the rest of the submarginal spots form a narrow regular band, a very distinguishable feature. White striae are also enhanced.
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20pactolus%20odon/Nacaduba%20pactolus%20odon%20-%20horace.jpg
http://www.butterflycircle.com/checklist/mugshots/Nacaduba%20pactolus%20odon/Nacaduba%20pactolus%20odon%202%20-%20Sunny.jpg



TL Seow: Cheers.