Bruner: Tropical American Tettigonoidea. 



307 



Genus Symmetropleura Brunncr. 

 Symmclro pleura Brunner, Mon. Phaneropt., 'pp- 25. 245 (1878); lb.. Addit. 



Mon. Phaneropt., p. 16 (1891). 



The genus Symmetropleura of Brunner is found in both hemispheres, 

 but seems most characteristic of the Occident. Five species have 

 been described heretofore. The collection now being studied by me 

 contains specimens of what appear to be two more. The American 

 forms can be separated as follows: 



> Synopsis of the American Species of Symmetropleura. 

 A. Elytra narrower (6 mm.), their posterior margin straight. [North America.] 



modesta Brunner. 

 A A. Elytra broader (10 mm. or more), their posterior margin rounded [South 

 America]. 

 b. Tegmina with the anterior border of the basal part black margined. 



IcEvicaiida Brunner. 

 bb. Tegmina with the anterior border concolorous. 



c. Posterior fork of branch of the hind radial confluent with the posterior 

 ulnar vein. 



d. Subgenital plate of the male abdomen rather short, truncate at 

 its apex and with the hind angles lengthily produced, style-like 



[Ecuador] fausta Giglio-Tos. 



dd. Subgenital plate of the male abdomen somewhat longer, the apex 



roundly emarginate, the angles produced into veiy heavy blunt, 



clubbed, finger-like projections [Bolivia]. . .boliviana sp. nov. 



cc. Posterior fork of the branch of the hind radial not confluent with the 



posterior ulnar, although sometimes it may be joined to it by an 



oblique cross- vein [Bolivia] abnormis sp. nov. 



13. Symmetropleura boliviana sp. nov. 



Related to S. fausta Giglio-Tos from Ecuador. The main differ- 

 ences between this new form and the insect to which compared are 

 in the male genitalia. 



Size medium, color grass-green. Fastigium of the vertex strongly 

 depressed in front, shallowly sulcate, the apex blunt and widely 

 separated from the fastigium of the front. Pronotum with its disc 

 strongly flattened and longitudinally sulcate at middle, the lateral 

 carince acute, rather evenly convergent anteriorly, the front margin 

 broadly and roundly emarginate, the hind margin evenly rounded; 

 lateral lobes as described in fausta. Tegmina evenly rounded both 

 in front and behind, the posterior ulnar vein straight and united with 

 the upper fork of the branch of the radial which runs out at the apex, 





