Potanthus lydia?

[DaveChiangMai]

I realize Potanthus sp are very difficult, but I would appreciate some ideas of which species this might be. I have read the extensive notes on Potanthus ID posted on this forum, and the closest match I can find to this is P. Lydia (or maybe at a pinch P. mingo). Photographed at Nam Nao, nc Thailand this week. Unfortunately only the underside.
Many thanks for any comments.

24784

[Psyche]

From the abdominal end & paler body, it is a female.
The FW spots overlap continuously ie there is no gap between the spots.
HW spot 6 is very large & almost fully overlaps spot 7 above it & most of spot 5.
Spots are edged in black with lighter shading.

Fully overlapping FW spots & large HW spot 6 are mainly seen in 3 species P. confucius, pava & rectifasciatus.

P. confucius; FW spots may almost have a gap (between spot 5 & 6 ) in the female.
HW spot 6 may be small ;dark edgings(spots) heavy.
Male Thailand ssp dushta.
https://wingscales.com/content/record/515-1-738e1.jpg
Female Taiwan ssp augustatus.
http://dearlep.tw/images/Papilionoidea/Hesperiidae/%E8%87%BA%E7%81%A3%E9%BB%83%E6%96%91%E5%BC%84%E8%9 D%B6(%E9%BB%83%E6%96%91%E5%BC%84%E8%9D%B6)%20DSC_0 068.jpg

P. pava. FW spots may have a gap as in confucius. HW spot 6 large ; black edgings fine & mostly linear.
Male upperside with a triangular orange patch at base of space 2.
Male Taiwan ssp lesbia.
http://image.digitalarchives.tw/ImageCache/00/5d/b6/ed.jpg
http://taibif.tw/zh/namecode/345498
Female Taiwan. Note overlap is very little on FW;HW spot 6 large.
http://catalog.digitalarchives.tw/item/00/5b/9b/db.html

P. rectifasciatus ;HW spot 6 very large & fully overlapping spot 7, as well as spot 5. ; heavy dark spottings/edgings.
Upperside with FW spot 4 & 5 mostly in line with the rest below ,( but less on the underside).
Male .Cambodia.
https://www.thaibutterflies.com/wp-content/uploads/2016/07/potanthus-rectifasciatus-1080x720.jpg
https://farm1.static.flickr.com/551/31550461875_f6787fae88_b.jpg

This should be Potanthus rectifasciatus female.

Potanthus lydia; large ; FW spots little overlap :Underside diffusely spotted :abdominal end wholly black.
http://www.samuibutterflies.com/02_images/travels/hesperiidae/potanthuslydia.r.jpg
https://c1.staticflickr.com/6/5648/21483016020_e0f34ba0dc.jpg


TL Seow: Cheers.

[DaveChiangMai]

Many thanks for the detailed reply. Indeed a good match against other web photos for this species. Once you have an idea of what to look for!