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Oh, I missed/forgot the Eacles genus...
I just found it! http://www.discoverlife.org/mp/20q?searc...
I only know 1 genus with these 4 horns: Citheronia sp., from Saturniidae, Ceratocampinae. But there might be others and I did not find a reasonable match of a Citheronia from Costa Rica. Common ones are C. bellavista and C. lobesis, but their horns are much more impressive than "yours".
Spotted on Jun 25, 2017 Submitted on Jun 25, 2017
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