iJRUNKR : South Ami:kicax Tkirigio-e. 99 



A. Posterior lateral loljes of the pronotutn lamellate, squarely truncate at the 

 apex; the median carina stronKly undulate for two-thirds of its length. 



scrrata Morse. 



AA. Posterior lateral lobes of the pronotum with their apex acutely produced; 



the median carina in front bicristate concinna Bolivar. 



Chiriquia serrata Morse. 



Chiriquia serrata Morse, Biol. Centr.-Am., Orthopt., II, 1900, 7. 



Habitat. — This insect has been recorded from Nicaragua, Costa Rica 

 and Panama in North America. There is no doubt in the writer's mind 

 but that its distribution also extends into South American territory as well. 



Chiriquia concinna (Bolivar). 



Metradora concinna Boliv.\r. Ann. Soc. Ent. Belg., XXXI, 1887, 249. 

 Chiriquia concinna Hancock, Genera Insectorum, fasc. 48, 1906, 39. 



Habitat. — Recorded heretofore from Paramaribo, Dutch Guiana and 

 Peru. Represented by a single specimen in the present collection coming 

 from Para, Brazil. Collection Carnegie Museum, Pittsburgh. 



Genus Platytettix Hancock. 



Plalyleltix H.\ncock, Ent. News, XVII, 1906, 88; Genera Insectorum, fasc. 48, 

 1906, 39. 



Three species of the genus Platytettix at least have come to light thus 

 far. They may be separated in this manner: 



A. Larger (8-9 mm.). Pronotum stronglj' reticulate and gibbous. 

 b. Apex of the anterior edge of the posterior lateral lobes of the pronotum greatly 



produced and acuminate reticulalus Hancock. 



bb. Apex of the posterior lateral lobes but little produced . . .gibbinoliis sp. nov. 



A A. Smaller (7 mm.). Pronotum comparatively smooth. Posterior angles of 



the pronotum roundly angulate uniformis sp. nov. 



Platytettix reticulatus Hancock. 



Platytettix reticulalus H.\ncock, Ent. News, XVII, 1906, 88-89; Genera Insec- 

 torum, fasc. 48, 1906, 40, pi. 3, figs. 23, 23a. 



Habitat. — Peru. 



Platytettix gibbinotus sp. nov. 



Very similar to P. reticulatus Hancock, but somewhat smaller, and with 

 the lower posterior angles of the pronotum shorter and less acute. It also 

 differs from that species in having the upper and lower carinae of the 

 anterior femora quite differently lobate than shown in Hancock's figure 

 {vide Genera Insectorum, fasc. 48, pi. 3, fig. 23) the upper one being 

 scarcely lobate, while the lower is strongly developed into two acute 



