Differences between Neurobasis chinensis and Neurobasis longipes
Both Neurobasis chinensis and Neurobasis longipes occur in Peninsular Malaysia, with N. chinensis being much more common. To be honest, I only encountered N. longipes at a very few locations in Peninsular Malaysia. The male individuals of N. chinensis and N. longipes are quite similar. The base of hindwing has more extensive area of clear cells in N. longipes if compared to N. chinensis. It is actually quite difficult to tell apart the male individuals of both the species based on in-situ photos. However, the in-situ photos of female individuals may help to know the presence of which species at the site. The wing of female N. chinensis has two white spots while the female N. longipes has one white spot (see the photos below). When Neurobasis male individuals are spotted at one site, the female individuals are also frequently present at the site. I normally use this character to identify N. chinensis and N. longipes on site without catching them.
Neurobasis chinensis - female
Taman Eko Rimba Jeram Linang, Ulu Sat Forest Reserve, Kelantan
Neurobasis longipes - female
Kuala Tahan, Pahang
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