480 N. C. AGR. EXP. STA. BUL. 239 
66. Genus MESOGONIA MeELIcHAR 
Ficures 397-430 
Mesogonia Melichar, 1926a:343. Type-species: Tettigonia ferrigatula Breddin, by subse- 
quent designation of China, 1938d:184. 
Santarema Melichar, 1926a:344. Type-species: Tettigonia ferrugatula Breddin, by present 
designation. 
Length of male 5.6-9.8 mm. 
Head with proportions quite variable, median length of crown from four- 
tenths to more than eight-tenths interocular width and from slightly less than 
one-fourth to almost one-half transocular width, anterior margin usually sub- 
angulate in dorsal view, most often with a distinct carina at transition from 
crown to face, ocelli variable in location, even intraspecifically, slightly before, 
slightly behind, or on a line between anterior eye angles, and variable intra- 
specifically as to relative position between median line of crown and adjacent 
anterior eye angle, crown almost always with a concavity between or before 
ocelli, or extending anteriorly from between ocelli, lateral clypeal sutures 
seldom extending onto crown and then not attaining ocelli; antennal ledges in 
lateral view with anterior margins nearly always rectilinear and _ vertical, 
rarely slightly oblique; clypeus varying from slightly convex to flattened or 
slightly concave medially, muscle impressions distinct or not, face pubescent 
or not beneath, transclypeal suture usually indistinct or incomplete, clypellus 
not produced, its profile continuing contour of clypeus, in some species with 
slight tumescence. 
Thorax with pronotal width usually approximately equal to transocular width 
of head, in some species distinctly wider, in others slightly narrower, dorso- 
pleural carina distinct and usually extending as far anteriorly as eye margin 
(varying intraspecifically in a few species, specifically in a few others), posterior 
margin concave, disk without sculpturing; scutellum not transversely striate 
behind transverse sulcus. Forewing membranous in some species, in others with 
membrane usually not clearly delimited anteriorly, grading gradually to texture 
of wing disk, including apical cells and in many species part of anteapical cells, 
veins distinct or not, with four apical cells, the base of fourth more proximal than 
base of third (only slightly so in M. atramentatula (Breddin)), outer apical cell 
subtending more of costal than of apical margin, without an anteapical plexus of 
veins, texture usually translucent (occasionally coriaceous), without sculpturing. 
Hindleg with femoral setal formula 2:1:1 (exception: M. evansi, n. sp., in which it 
is 2:0:0); length of first tarsomere greater than combined length of two more dis- 
tal tarsomeres and with two longitudinal rows of small setae on plantar surface. 
Male genitalia: Pygofer varying from slightly to strongly produced, 
posterior margin varying from acutangular to broadly convex, with 
macrosetae usually occurring only on apical third, very few in some species, 
with or without processes, arising mesosubapically in those species in which 
they occur (exception: M. grapta, n. sp., in which they arise on posteroventral 
margins). Plates variable interspecifically in form and in degree to which they 
extend posteriorly in relation to pygofer, with or without macrosetae which 
