E. thrax. FW 31/37 mm.
FW apex sharper & margin straight. UpF apical margin may be lightly shaded white.
Antennal club 1/2 white in female & 2/3 white in male.
HW patch relatively broad throughout.
Previously the continental population was given as E. acroleuca apex.
Taxon apex type location Luzon is now considered as a ssp or full species & is not aplicable to the mainland population (unless the Philippine & continental forms are considered the same.) http://yutaka.it-n.jp/hes/92340010.html
There does not seem to be any article treating taxon apex as a separate species.
See PDF ,A taxonomic note on Erionota acroleuca. https://www.google.com/search?q=erio...hrome&ie=UTF-8
FW sharp ,margin straight. UpF apical margin shaded white but may be brown.
Antennal club fully white above in the male & 1/2 white in the female.
HW with the pale patch much narrower in the upper half.
Smaller FW 29/31 mm.
The two spwcies can be hard to judge in some cases.
The position of the costal spot can be ambiguous.
The text states in C. panormus the FW costal spot is adjoining the band ,meaning it is very close to it.
The upperside colouration is also hard to judge in photos.
In male C. strabo the FW submarginal chevrons are more flatten out so that the submarginal band have more level margins.
On the HW the submarginal chevrons are all rather broad.
In C. panormus male, the FW submarginal chevrons are strongly V-shaped.
On the HW the submarginal chevrons are all narrower.
From all the examples this individual is a C. strabo male . The upperside normally have darker outer streaks