Post 6
no. 12 Choaspes benjaminii

The 3 short-tailed Choaspes are almost impossible to separate from the underside.

Choaspes benjaminii has smaller black spots (much so in Malaya) & the orange space inner & outer black marks are wide.
http://dearlep.tw/images/Papilionoid...6_DSC_0036.jpg

Choaspes xanthopogon. The orange space between the inner & outer black marks are narrow.
https://
http://www.thaibutterflies.com/wp-co...anthopogon.jpg
http://v3.boldsystems.org/pics/HSPEC...1264341296.JPG
Taiwan has only C. xanthopogon & benjaminii. In C xanthopogon the large 'spot' may be upturned at the end as here.
https://c1.staticflickr.com/9/8002/7...61f90ca3_b.jpg

C. furcatus Practically identical to C. xanthopogon but large s'spot' always curved up ;in space 3 inner spot is 3X smaller than outer one; orange spacing typically wide.
https://www.ifoundbutterflies.org/me...1a_7/av115.jpg
https://wingscales.com/content/record/3055-1-06b00.jpg

TL Seow: Cheers.