Butterflies to Id - South East Asia

Actually both are Chilasa clytia subspecies clytia, the first is a male of form dissimillima which is nowhere near as dark as the female and the second is form clytia. The male of form dissimilis is very easy to distinguish on the underside, the black lines along the veins on the hindwing are much broader than in form dissimilis, where the white streaks almost reach the veins. Here's a quick photo I just took to show the difference:




The white streaks of form dissimilis male are also broader on the upperside, but the underside is obvious. I have bred both of these in hundreds, and the form dissimillima females always give males that look like this when mated with males of the same form, although occasional specimens can be darker approaching the females. Both these forms also have a dark blue sheen on the upperside of the wings in the male, which is not obvious in photos.

Chilasa clytia palephates is one of the subspecies from The Philippines, and looks similar, but not identical.

Personally I don't like to treat Chilasa as a genus, since it is internal to Papilio. At best it should be regarded as a subgenus. Interestingly 'Chilasa', 'Agehana' and Papilio alexanor are all related to the American Papilio species, not the Asian or European ones.

Specimen 2 is Euploea core godartii and specimen 4 is Euploea klugii erichsonii.

Adam.