Subfamily: Idiocerinae [?]
Length: hopper in top photo 3.5 mm to the apex of the wings; in lower photo 5.0 mm.
While we have filed these images under Idiocerinae, one of our expert-mentors on matters of Cicadellidae warns that without an image of the face, it is not possible to rule out subfamily Neobalinae.
The two hoppers shown here were photographed at lights at Montagne de Kaw, French Guiana, on 31 May 2011.
American Insects site