Request help with ID of skipper

[DaveChiangMai]

Photographed at Doi Phu Kha, n Thailand. Spent considerable time on this one, but not able to find anything like it. Thoressa or Sovia would seem the closest.
Request help please.

25064

25065

[Psyche]

The unmarked HW & pale area on the antenna indicate Caltoris.
There are two FW cellspots & the underside HW is rather dark brown.

This rule out species without cellspots ie plebeia, malaya, tulsi, kumara, philippina, .
Of the followig with cellspots (one or two), thye following can be eliminated.
C. cormasa ;UnHW deep red brown.
C. brunnea ;FW with a brand' HWUn dark purple brown.
C. bromus :HWUn. overlaid with ochreous scales.
C. sirius sirius; FW usually with a spot 1b. Evans state of ssp sirius UnHW chocolate : Eliot state of ssp fusca UnHW ochreous.
C. tenuis : Greenish yellow hair & UnHW with greenish yellow scales.
C. aurociliata ; cilia of both wings bright yellow.

This leaves two possibilities.

1. C. cahira austeni; UnHW overlaid with dark chocolate (may be paler).
https://www.thaibutterflies.com/wp-content/uploads/2016/07/Caltoris-cahira-1080x720.jpg
https://wingscales.com/Hesperiidae/Caltoris-cahira-austeni


2. C. confusa. Evans states this is darker (than bromus) usually with reduced markings particularly in the absence of the upper cellspot & the spot in space 3 (spot 3)(Possibly Evans meant spot 4)


Since this is fully spotted it is probably Caltoris cahira austeni. Correction: FW spot 4 is absent.


TL Seow: CHeers.
PS. This seem more likely to be Caltoris confusa.
1. The spot in space 4 (spot 4) is missing. Upper FW cellspot very small.
2. The underside is not uniformly dark brown as in C. cahira.

Caltoris confusa . male ,Ataran valley, Myanmar. Fig. 19 & 20 .
https://www.zobodat.at/pdf/Atalanta_42_0193-0200.pdf

[DaveChiangMai]

Many thanks for the detailed reply and especially the link to the detailed paper - very useful.
As usual with these skippers it's important to first be able to identify the genus.
Something that certainly takes time to learn from experience.