Length: spittlebug in the photo measured 8.3 mm
Eight described species make up genus Zulia; they are distributed from Mexico south to at least Bolivia.
Zulia pubescens is a variable species, with the tegmen sometimes bearing one to three yellowish spots. The heavy pubescence is a key trait of this species. Distribution of Z. pubescens is across most of northern South America.
The species is of economic importance, as a pest of forage grass in the genus Brachiaria. Some varieties of the grasses with resistance to spittlebugs have been developed.
Photo location: Montagne de Kaw, French Guiana (top two photos); Bergendal, Suriname (bottom photo).
Bottom photo determined by Dr. Gervasio S. Carvalho, Pontifícia Universidade Católica do Rio Grande do Sul, who notes that a specimen would be needed for a more certain identification.
American Insects site