2 Feb 2015 - In Biologia Centrali-americana: Zoology, Botany and Archaeology, Volume 39, 1881-1900, the author describes Thysania tiasa as a new species, in Costa Rica. This is the only reference I've seen to T. tiasa. It probably didn't stick - it is stated here that it "is allied to T. zenobia" but of an entirely different color. And: "One specimen only has been received."
He cites T. agrippina records from Guatemala and Nicaragua - the only data we currently have for those countries. He states that T. agrippina is "common in April on the tree trunks at the Chriqui Volcano." - DLC