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Catopsilia pyranthe
Feeding on the leaves of a candelabra bush - Senna alata
Also note the chrysalis's short "snout", which is considerably longer in C. pomona. Regrettably, the small pupal photo on the Wikipedia page referenced by Nuwan is misidentified. FYI, Emigrant (Catopsilia) caterpillars can be difficult to differentiate by appearance alone, with much blurring of any distinctions. However, what I've learned over the years is that, generally speaking, Lemon/Common (C. pomona) larvae have a more or less solid white lateral stripe and at times wide, dark band immediately above, while Mottled (C. pyranthe) cats typically have a faint yellow line along the top of their white lateral stripe.
Definitely a Catopsilia species perhaps Lemon Emigrant (Catopsilia pomona)
http://en.wikipedia.org/wiki/Catopsilia_...
Thanks Hemma! No never saw it again ......... like to think it's mum found it : )