Which Horaga?
Dr Seow, someone just shot this Horaga at Telok Blangah Hill Park. Is this H. albimacula, H. chalcedonyx or an atypical syrinx ?
Horaga-X2.jpg
Horaga onyx sardonyx.
Of the four similar species they can be group into two.
The smaller H. albimacula & chalcedonyx have the foreleg tibia mostly white
H. albimacula have the FW white patch large like H. onyx . Upperside brown. Upperside FW white patch ends at vein 2.
http://thaibutterflies.com/wp-conten...albimacula.jpg
HK
http://hkcww.org/hkmoth_butterfly/readid.php?id=5865
H. chalcedonyx have the FW white patch narrower & upperside is marked with blue scales. Upperside FW white patch extends below vein 2 into space 1b.
http://yutaka.it-n.jp/lyc4g/83173020.html
Additional note The only consistent difference in underside (based only on a couple of valid specimens each) is in H. albimacula . the FW white spot tend to be wider & its outer border have a mid angulation with a notch.
In H. chalcedonyx the white spot is narrower, its outer border regularly convex.
The two larger species H. syrinx & onyx have the foreleg tibia banded as the rest.
H. syrinx maenala.
The FW white patch is typically narrow. (In some ssp. broad as in onyx )
HW postdiscal band ,the narrow part after the bend is undulate, variously thicken & reaches vein 1a but not the margin.
http://www.butterflycircle.com/check...ark%20Wong.jpg
http://www.butterflycircle.com/check...20-%20Khew.jpg
http://www.butterflycircle.com/check...04_02_2011.jpg
http://www.butterflycircle.com/check...20-%20Khew.jpg
http://yutaka.it-n.jp/lyc4g/83170010.html
H. onyx sardonyx.
FW white patch is typically broad.
HW postdiscal band after the bend is mostly straight on its upper /inner black-edged margin .& runs past vein 1a to very near the margin (dorsum)
Thailand.
https://thaibutterflies.com/wp-conte...x-1080x675.jpg
India.ssp onyx .
https://www.ifoundbutterflies.org/me...ekar_ag359.jpg
P. Malaysia.
https://inaturalist-open-data.s3.ama...jpg?1578210772
Singapore. This image is also in NSS.
https://farm4.staticflickr.com/3480/...fac_z.jpg?zz=1
http://yutaka.it-n.jp/lyc4g/83160010.html
TL Seow: Cheers.
Last edited by Psyche; 23-Oct-2021 at 02:50 AM .
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