http://www.nymphalidae.net/taxon_db/search.php
The search field can take up to three arguments of butterfly names (no matter whether you enter genus or species names), and the script will look for genus and species names that will match your query.
For example a search for the species Euptychia enyo will output this taxon but also all other Euptychia and even Corades enyo:
Still have to get rid of the duplicates like the second Euptychia enyo at the bottom of the returned results.