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Nica sp.
About two inches. Dark green, light green, yellow and Pink!
Juan, please know that Arthur's Nica flavilla (my ID, originally posted as Myscelia) is in its final instar, while your Catonephele numilia is in its next-to-last (penultimate) stadium. A careful review of the ACG links provided should help differentiate the two caterpillars, but to make the task easier:
N. flavilla penultimate instar . . .
http://janzen.sas.upenn.edu/2700ARCHIVES...
C. numilia penultimate instar . . .
http://janzen.sas.upenn.edu/2700ARCHIVES...
More importantly, note Nica's lack of dorsal scoli. Kindly double-check and tell us if you still disagree. Thanks.
I have to say I disagree with Catonephele numilia. They lack dark spots on the body, and the head is remarkably different. (http://butterfliesofamerica.com/catoneph...). In contrast, Nica (sp.) looks very similar (http://www.flickr.com/photos/artour_a/13...)
Penultimate (PU) Nica larvae look very different . . .
http://janzen.sas.upenn.edu/caterpillars...