ID Help Dr Seow

[Chestnut Bob]

I shot this skipper in Pulau Ubin in Mar 2017. I'm confused which species it is as there are a few skippers that has no marking on the underside of the hind wings. Please help.
20170304-UFO Skipper-PU.jpg

[Psyche]

Male Caltoris cormasa.

The Caltoris can be confusing since much depend on the colouration.


1. Caltoris cormasa: Rusty red brown underside ; UnF spots yellowish; usually 3 subapicals.
Male, female.
http://2.bp.blogspot.com/-TjKxWVHrQm...herHern_01.jpg
http://3.bp.blogspot.com/-dg1jseJPJ2...0/DSC_0115.JPG

2. Caltoris malaya.: Underside rusty brown, male ; ochreous brown in female. FW short, spots yellowish; subapicals usually two; antennal pale area poor.
https://2.bp.blogspot.com/-WmnlNXMo6...M_adult_03.jpg
https://4.bp.blogspot.com/-j1Pq5mDim...M_adult_06.jpg

3. Caltoris bromus.Underside dark brown with ochreous overlay ; UnF spots white, subapicals usually two ;female often with 1- 2 spots in HW space 2 & 3.
http://photobucket.com/gallery/user/...MS5wbmc=/?ref=
Female here is from Taiwan.
https://www.flickr.com/photos/53747735@N08/6191981927/

4. Caltoris cahira :UnH dark chocolate brown ; UnF spots white, subapical usually two.
https://www.thaibutterflies.com/wp-c...ris-cahira.jpg
http://4.bp.blogspot.com/-7l1dr3n_gK...ris+bromus.jpg

5. Caltoris philippina: Underside with greenish ochreous scales ; FW longer & sharper in male, spots yellowish.
http://www.butterflycircle.com/check...ld_male_01.jpg
Female : Note FW has no cellspot.
http://4.bp.blogspot.com/-3m-dnKh43T...philippina.jpg
http://1.bp.blogspot.com/-GX8SuhLKin...philippina.jpg


The Baoris can be rather similar :FW more sinuous in shape; antennae pale area weak ;Male with a pale mark on HW cellend corresponding to the hair-tuft on the upperside.

Baoris oceia :male & female.
http://farm6.static.flickr.com/5091/...6cc0a7c68a.jpg
http://4.bp.blogspot.com/-zofygsdg7G...oris+oceia.jpg

Baoris farri male Underside paler brown.
https://wingscales.com/content/record/98-1-f75cb.jpg


TL Seow: Cheers.

[Chestnut Bob]

Thank you Dr Seow! These skippers are really hard to tell apart LOL.

[Tai LA]

Agree with you Bob! I’m clueless about them!