420 N. C. AGR. EXP. STA. BUL. 239 
57. GENUS PLATYGONIA MELICHAR 
Ficures 341-346 
Platygonia Melichar, 1925a:340. Type-species: Tettigonia praestantior Fowler, by original 
designation. 
Oxycoryphia Melichar, 1926a:344. Type-species: Tettigonia spatulata Signoret, by subse- 
quent designation of China 1938d:184. New synonymy. 
Oxygonia Melichar, 1926a:344. Type-species: Ciccus ignifer Walker, by subsequent 
designation of China 1938d:184. Preoccupied. 
Oxygonalia Evans, 1947a:163, new name for Oxygonia Melichar. New synonymy. 
Length 7.8-14.2 mm. 
Head very strongly produced, median length of crown varying from nine- 
tenths of to slightly more than one-fourth greater than interocular width and 
from slightly more than six-tenths of to equal to transocular width, anterior 
margin narrowly rounded in dorsal view, usually with a distinct carina at 
transition from crown to face (exception: P. angrana, n. sp.), ocelli located 
slightly before a line between anterior eye angles, variable with respect to 
relative distance between anterior eye angle and median length of crown, disk 
shallowly concave from ocelli to apex (exception: P. detecta, n., sp.), with or 
without a median longitudinal fovea (variable interspecifically), lateral clypeal 
sutures extending onto crown, attaining ocelli or not; antennal ledges not or 
very slightly protuberant in dorsal aspect, in lateral view with anterior 
margins strongly oblique; clypeus flat or slightly concave, muscle impressions 
distinct or not, face with pubescence usually not distinct except a pair of setae 
at apex of clypellus, clypellus with profile continuing contour of clypeus. 
Thorax with pronotal width equal to or greater than transocular width of 
head, lateral margins convergent anteriorly, dorsopleural carinae complete, 
posterior margin concave, disk transversly rugose; scutellum striate or not 
behind transverse sulcus. Forewing without a membrane (exception: detecta), 
veins indistinct, not elevated, with four apical cells, the base of fourth more 
proximal than base of third, without an anteapical plexus of veins, texture 
coriaceous and without sculpturing; forewings of female in rest position ex- 
ceeding apex of ovipositor. Hindleg with femoral setal formula 2:1:1, length of 
first tarsomere variable compared with combined length of two more distal 
tarsomeres and with two parallel rows of small setae on plantar surface. 
Male genitalia: Pygofer moderately produced, posterior margin broadly 
convex, macrosetae from few to many on posterior half, microsetae oc- 
casionally present. Plates triangular, not extending posteriorly as far as 
pygofer apex, narrowed in basal half, with uniseriate macrosetae. Style ex- 
tending posteriorly almost as far as apex of connective, without preapical lobe, 
truncate apically. Connective Y-shaped with arms widely divergent and stem 
longer than arms, keeled. Aedeagus symmetrical with shaft short, simple or 
with an unpaired ventral process. Paraphyses absent. 
Female (unknown in P. infulata, n. sp.) abdominal sternum VII produced 
and with posterior margin convex. Ovipositor with second valvulae each ex- 
panded beyond basal curvature, teeth variable, either large and quadrate and 
bearing secondary teeth but without intercalary secondary teeth, or smaller 
and not bearing secondary teeth but with conspicuous intercalary teeth, 
