Skippers ID clarification in Singapore

[Psyche]

Post 72.

1. Female T. besta.

If there are dark-dusted veins it is besta. A pale vform. Underside is actually greenish ochreous.
http://1.bp.blogspot.com/-GqK3ID-7Ml...sta%2Bbina.jpg
Female T. linna
https://4.bp.blogspot.com/-e_7pWdo7X..._female_03.jpg


2. Female Caltoris philippina; Longish FW, margin incurved at lower 1/2.
Greenish ochreous scales.
http://4.bp.blogspot.com/-3m-dnKh43T...philippina.jpg


3. Female Pelopidas mathias; dirty undersdie,

P. conjunctud.
https://wanderingbutterflyeffect.fil...2468f1860b.jpg
https://2.bp.blogspot.com/-FvDO3Lfw_...lt_Khew_03.jpg
https://2.bp.blogspot.com/-Qmzp-Y5H8...mesChia_01.jpg


TL Seow: Cheers.

[sabafish]

Hi Dr Seow,

Would require your assistance to help ID this skipper.

Pelopidas sp.? No HW cell spot though, and size is 1.5x a P. mathias.

DSC_0832.jpg DSC_0862.jpg

Thank you!

[Psyche]

Post 74.

Female Polytremis lubricans.
1 UnH with coarse ochreous scalings.
2 HW spot 4 (translucent) wide & aligned almost at right angle to spots 3 & 5.
3.Antenna with orange tip & black band.

FW cellspots may be conjoined or separate.
FW spot 2 is angular, quadrate in female & ovate in male.

Females.
http://1.bp.blogspot.com/-0cUzxS0FpT...us%2BSwift.jpg
https://wanderingbutterflyeffect.fil...089073860c.jpg
Male.
https://www.ifoundbutterflies.org/si...rkar_ap206.jpg


TL Seow: Cheers.

[sabafish]

Hi Dr Seow,

Could I check if the following skippers are all Erionota thrax?

I am unable to visualise the difference between E. thrax and E. torus and would like to seek your assistance to shed light on the differences.

a)
DSC_0536.jpg

b)
DSC_0998.jpg

c)
DSC_1003.jpg

Thank you!

[Psyche]

Post 76.

1. Female Erionota thrax.

2, & 3. Female Erionota torus.

The two can be quite confusing in fieldshots.

Females with antennal club half-white, males with antennal club 3/4 white.
ERIONOTA.png
http://yutaka.it-n.jp/hes/92330001.html
http://yutaka.it-n.jp/hes/92320001.html

Note in shots 2 & 3 the head is nearer the camera ( it appear larger).
The oblique view render the termen (outer margin ) somewhat straight.

Erionota thrax.
Males.
https://wanderingbutterflyeffect.fil...0f3c25860d.jpg
https://inaturalist-open-data.s3.ama...6072/large.jpg
https://inaturalist-open-data.s3.ama...003/large.jpeg

https://inaturalist-open-data.s3.ama...1805/large.jpg
https://inaturalist-open-data.s3.ama...810/large.jpeg

https://inaturalist-open-data.s3.ama...602/large.jpeg
https://inaturalist-open-data.s3.ama...601/large.jpeg

Females.
http://www.butterflycircle.com/check...2012--0060.jpg
https://inaturalist-open-data.s3.ama...758/large.jpeg


Erionota torus.
Males.
https://upload.wikimedia.org/wikiped...nota_torus.jpg
https://inaturalist-open-data.s3.ama...8210/large.jpg
https://static.inaturalist.org/photo...322/large.jpeg
Females.
http://www.butterflycircle.com/check...2012--0882.jpg
https://inaturalist-open-data.s3.ama...560/large.jpeg
https://inaturalist-open-data.s3.ama...9518/large.jpg


TL Seow: Cheers.

[sabafish]

Thanks for the diagrams Dr Seow! It made the part on wing margins alot more clearer.

Can I check if the FW spots are diagnostic? I have added additional photos to the photos 2 & 3 for post 76 as the FW spots look kind of different.

Post 76:

2) Added a shot showing FW upperside and a more parallel shot of the underside.

DSC_0984.jpg DSC_0995.jpg

3) Similarly, added a shot of FW upperside and a more parallel shot of the underside.

DSC_1019.jpg DSC_1021.jpg


In addition, adding on another Erionota, could this be E. torus then?

A)

DSC_0008.jpg DSC_0013.jpg

Thank you!!

[Psyche]

Post 78.

The shape of spot 3 was given by Flemings, author of BoWM&S.
It is not absolute. Need to view in the correct perspective.
You can see the difference in the Yutaka website,

2 is certain to be E. torus. Corrected.
3 looks to have the termen a bit straighter, but FW is broad as in E. torus.
Compare typical E. thraxfemale with narrower FW.
http://www.butterflycircle.com/check...2012--0060.jpg

I would include it as E. torus.

Do note interspecific crosses occur & can be fully fertile with sibling species.

A. is fairly typical E. torus female.


TL Seow: Cheers.