Telenassa berenice drusinilla.
The genus Telenassa has 8 known species which occur in South America.
Thank you Bayucca! Nice to know the name of this elusive butterfly. You are very kind.
I am pretty sure, let's say 98% with Berenice:
http://www.flickr.com/photos/caponito/52...
Lat: -24.79, Long: -65.42
Spotted on Oct 15, 2012
Submitted on Oct 16, 2012