These treehoppers are probably two species in the genus Cyphonia.
The first one you may recognize from this book cover.
Subjects: Insects, Treehoppers, and True Bugs.
Places: Brazil, Caraça Natural Park, Minas Gerais, and South America.
Life Stages: Adult.
Taxa: Class Insecta, Family Membracidae, Genus Cyphonia, and Order Hemiptera.
Colors: Black, Red, Transparent, and White.