30 U.S. NATIONAL MUSEUM BULLETIN 261 



KEY TO MALES OF PROCONIA 



1 . Aedeagal processes strongly bisinuate 2 



Aedeagal processes not so 3 



2. Aedeagal processes with a slight rounded protuberance near 



midlength P. fusca Melichar (fig. 4) 



Aedeagal processes without such a protuberance. 



P. marmorata (Fabricius) (fig. 3) 



3. Aedeagal processes with a slight angular protuberance before 



midlength P. esmeraldae Melichar (fig. 5) 



Aedeagal processes without any protuberance. 



P. lutzi Schmidt (fig. 6) 



3. Genus DIESTOSTEMMA Amyot and Serville 



Figures 7-32 



Diestostemma Amyot and Serville, 1843a:572. Type-species: Cicada albtpemis 



Fabricius, by original designation and monotypy. 

 Leucopepla Kirkaldy, 1907d:87. Type-species: Tettigonia bituberculata Signoret, 



by original designation. New synonymy. 

 Heterostemma Melichar, 1924a:227. Type-species: Tettigonia nervosa Signoret, 



by original designation. New synonymy. 

 Chiapasa Schmidt, 1928a:40. Type-species: Tettigonia rugicollis Signoret, by 



original designation and monotypy. New synonymy. 

 Pibrochoides Haupt, 1929c:252. Type-species: Tettigonia rugicollis Signoret, by 



original designation. 



Length 13-22 mm. 



Head strongly produced, median length greater than interocular 

 width (occasionally greater than transocular width), anterior margin 

 not carinate, nearly always with a short median apical tuberosity, 

 ocelli located on a line between anterior angles of eyes and each 

 usually slightly closer to adjacent eye angle than to median line of 

 crown, nearly always without a distinct M -shaped elevation bordering 

 posterior margin, usually without a median fovea, occasionally with 

 a partial one, without a longitudinal carina laterad of each ocellus, 

 with or without pubescence on disc, lateral clypeal sutures extending 

 onto crown, attaining ocelli; antennal ledges protuberant in dorsal 

 aspect, with or without a longitudinal fovea, in lateral aspect carinate 

 or not dorsally, anterior margin declivous; clypeus convex, depressed, 

 or flattened medially, transclypeal suture not distinct throughout 

 length ; face pubescent beneath ; clypellus not protuberant, its contour 

 continuing profile of clypeus. 



Thorax with pronotum wider than head including eyes, lateral 

 margins convergent anteriorly, disc punctate to pitted and occasionally 



