CICADELLINAE: PART 2. NEW WORLD CICADELLINI 501 
(see illustrations), its longer styles, in the form of its connective and in its 
much smaller size. It differs from all other species in the genus in its strong 
sclerite on the dorsal surface of the male plate. The connective is more 
strongly joined to this sclerite than to the styles. 
Mesogonia emarginata, NEW SPECIES 
FIGURE 413, PAGE 502 
Length of male 6.9 mm. Head with median length of crown more than six- 
tenths interocular width and slightly less than four-tenths transocular width, 
anterior margin rounded in dorsal view, without a carina at transition from 
crown to face, ocelli located on a line between anterior eye angles, each equi- 
distant from adjacent anterior eye angle and median line of crown, crown 
with a slight median concavity before ocelli, lateral clypeal sutures extending 
onto crown, not attaining ocelli; antennal ledges with anterior margins ob- 
lique in lateral view; clypeus very slightly flattened medially, muscle impres- 
sions distinct; face not pubescent beneath, transclypeal suture indistinct, 
clypellus not tumid. Thorax with pronotal width slightly less than trans- 
ocular width of head, dorsopleural carina extending anteriorly as far as eye 
margin, forewing translucent with veins not very distinct. 
Male pygofer strongly produced, dorsoapical margin strongly convex, with 
very few (less than 15) anteapical macrosetae, without processes; plates not 
extending posteriorly as far as pygofer apex, without an anteapical dorsal lobe 
in lateral view, each in ventral view very abruptly tapered in basal third, with 
a few uniseriate macrosetae and a number of microsetae; style extending 
posteriorly slightly farther than apex of connective, with a slight preapical 
lobe, gradually narrowed to narrowly rounded apex which is curved at nearly 
90° to axis of shank; connective Y-shaped with arms very widely divergent; 
aedeagus arched slightly ventrally, apical portion expanded on ventral margin, 
apex truncate, without processes; paraphyses consisting of a long stalk and 
two very short apical rami. Female unknown. 
(Color of type probably affected by moisture). Crown dull yellow with me- 
dian line, a pair of arcs extending, one on each side, along coronal portion of 
lateral clypeal suture, and anterior margin from apex to lateral clypeal suture 
on each side, black; pronotum with broad anterior submarginal area dull 
yellow tinged with castaneous, posterior two-thirds dull green; scutellum dull 
yellow with a broad median fuscous line; forewings sordid translucent brown- 
ish with a subcostal yellowish stripe suffused with castaneous, extending to 
base of outer anteapical cell; face black except a pale area next each eye on 
adjacent antennal ledge; thoracic pleura and legs black marked with yellow. 
Holotype male, Yungas de Palmar, Bolivia, 100 m., November 1960 (A. 
Martinez) (SSM). 
M. emarginata, n. sp., is similar to M. paganula (Jacobi) in that the plates are 
abruptly narrowed in their basal third, but this condition is more striking in 
emarginata in which the “shoulder” of the plate almost forms a separate lobe. 
M. emarginata may also be distinguished readily from paganula by the aedeagus 
which is longer and not nearly as abruptly truncate as in the Jacobi species. 
