724 N. C. AGR. EXP. STA. BUL. 239 
sutures extending onto crown and attaining ocelli; antennal ledges not pro- 
tuberant, in lateral view with anterior margins obliquely rectilinear; clypeus 
not strongly convex, muscle impressions not very distinct, face without 
pubescence. 
Thorax with pronotal width less than transocular width of head, lateral 
margins parallel, dorsopleural carinae incomplete, posterior margin slightly 
concave, disk without sculpturing; scutellum not striate behind transverse 
sulcus. Forewing without a membrane, veins not very distinct; with four 
apical cells and base of fourth more proximal than base of third, without an 
anteapical plexus of veins, texture coriaceous, without sculpturing; forewings 
of female in rest position exceeding apex of ovipositor. Hindleg with femoral 
setal formula 2:1:1:1; length of first tarsomere greater than combined length 
of more distal tarsomeres and with parallel longitudinal rows of small setae on 
plantar surface. 
Male genitalia: Pygofer short, posterior margin subtruncate, macrosetae 
sparsely arranged on posterior half and with a few microsetae. Plates not ex- 
tending as far posteriorly as pygofer apex, each triangular, with a few macro- 
setae and numerous microsetae. Style extending approximately as far 
posteriorly as apex of connective, without preapical lobe. Connective T- 
shaped, with a median keel. Aedeagus symmetrical, elongate, crescentiform, 
its apex directed ventrally, with a pair of processes at its base and another 
pair at apex and with smaller setalike processes along length of shaft. Para- 
physes paired, symmetrical, greatly reduced. 
Female abdominal sternum VII with posterior margin transverse, with a 
very slight median quadrate lobe. Dorsal membrane of genital chamber with a 
complex hinged sclerite. Ovipositor with second valvulae each broadened 
beyond basal curvature, bearing dorsal quadrate teeth, each with minute 
secondaries, almost to apex which is narrowly rounded; anteapical denti- 
culations obscure on dorsal and apicoventral margins. Pygofer moderately 
produced and narrowly rounded posterodorsally, with numerous macrosetae 
in a band parallel to posteroventral margin. 
Pegogonia occurs in the Guianas, Trinidad, Venezuela, Colombia, and Peru. 
Pegogonia is similar to Balacha Melichar in the curvature of the aedeagus, the 
multiseriate plates, and the presence of paraphyses, in the male; and in the 
form of the second valvulae of the female and in the non-produced abdominal 
sternum VII. The form of the head differs in the two genera, being more pro- 
duced in Balacha, and the latter is much less robust than Pegogonta. 
The following synonymy is based on a study of the lectotype of Cicada rufipes 
Fabricius and the holotype of Tettigonia decora Walker. 
SPECIES OF PEGOGONIA 
rufipes (Fabricius), 1803a:68 (Cicada). Br., Fr., and D. Guiana; Trinidad Is.; Venezuela, 
Colombia, Peru. New combination. 
decora (Walker). 1851b:744 (Tettigonia). 
