Noted on the side of a tree in the Brazilian Atlantic Rainforest in Oct 2017. About 3-4 cm long . Middle of a very hot day.
That is a planthopper, order Hemiptera, suborder Auchenorhycha, Superfamily Fulgoroidea. It looks to be in the Genus Phrictus. Very similar to a picture I saw on the web of Phrictus diadema.