Horaga syrinx?

[horace2264]

Is this Horaga syrinx? The hindwing band suggests so, but the strongly notched and broad white band in the forward wing cast some doubts. :hmmm:

The caterpillar and pupa stage of this specimen closely resemble those of the earlier Horaga albimacula specimen.

27460

[Psyche]

Male Horaga onyx sardonyx.


Four similar species.

Larger, FW 13-16mm; Foreleg tibia banded black & white, variable.

H. syrinx. FW white spot typically narrow ,outer margin often regular, less notched.often veins dark.
UnH postdiscal white band after the sharp bend falls short of crossing vein 1a.
http://www.butterflycircle.com/checklist/mugshots/Horaga%20syrinx%20maenala/1DMK3----1261---04_02_2011.jpg
http://www.butterflycircle.com/checklist/mugshots/Horaga%20syrinx%20maenala/Ambon%20Onyx%20-%20Khew.jpg
https://www.inaturalist.org/observations/72762752

H. onyx. FW white spot typically broad, with a strong notch/step on outer margin.
UnH postdiscal white band, after bend continue pass vein 1a to the inner margin.
https://farm4.staticflickr.com/3480/3845446530_d138b0afac_z.jpg?zz=1
https://inaturalist-open-data.s3.amazonaws.com/photos/164525137/original.jpg
https://inaturalist-open-data.s3.amazonaws.com/photos/29346179/original.jpg?1545320128
https://inaturalist-open-data.s3.amazonaws.com/photos/113581227/large.jpg



Smaller FW 11-12 mm. Foreleg tibia mostly white.

H. albimacula.
UpF white patch large , outer margin often notched, but white patch does not extend below vein 2 into space 1b. Groud colour brown.
Unh white band stops at vein 1a, but with a small broken extension into the marginal space.
https://thaibutterflies.com/wp-content/uploads/2016/07/Horaga-albimacula.jpg
https://i1132.photobucket.com/albums/m572/angiud/TheVioletOnyx.jpg
https://inaturalist-open-data.s3.amazonaws.com/photos/160029682/original.jpg

H. chalcedonyx. FW white patch outer margin regular typically wiyhout a notch narrower, extending below vein 2 into space 1b.
Wingbase with blue scalings.
UnH postdiscal white band stops before vein 1a , not extending past it.
https://thaibutterflies.com/wp-content/uploads/2016/07/Horaga-chalcedonyx-2.jpg
https://static.inaturalist.org/photos/14942354/original.jpg


TL Seow: Cheers.

[horace2264]

Many thanks, Dr Seow for the ID of the Common Onyx specimen. I was mistaken and wrongly thought that the HW band did not cross below vein 1a.
It is great that we finally have a definitive proof with a specimen that Common Onyx is still extant in Singapore.