8 Annals of the Carnegie Museum. 



by their less flattened or depressed bodies and the non-clypeate 

 anterior femora. 



3. Eomorphopus granulatus Hancock. 



Eomorphopus granulatus Hanxock, /. c, p. 38, no. 2, pi. 4, figs. 35, 35a (1906); 

 Bruner, /. c, p. 98 (1910). 



The following listed material is at hand: I cf , 4 9 9, Benevides, 

 Para, Brazil, October 1918 (S. M. Klages), Ace. No. 6174; i 9, 

 Oucatopi Island, June, 1918, Ace. No. 6178; i 9, Cayenne, Ace. 

 No. 5897; I 9 , Mana River, French Guiana, May, 191 7, Ace. No. 

 6008. 



Genus Platytettix Hancock. 



PlalyleUix Hancock:, Ent. News, XVII, 1906, 88; Gen. Ins., Fasc. 48, Orth. Acrid. 

 Tetr., 1906, 39; Bruner, Ann. Car. Mus., VII, 1911, 99. 



4. Platytettix arcuatus sp. nov. 



Having the same general appearance as the remainder of the repre- 

 sentatives of the genus Platytettix, but a little smaller than either 

 gibbifiotus or uniforniis, which were characterized in a former number 

 of the Annals (Vol. VH, pp. 99-100, 1910). In the synoptic table 

 for the separation of the known species of the genus the present form 

 falls between the two here referred to. If we include this species, 

 the key should be modified as follows: 



Key to the Species of Platytettix. 



A. Pronotum strongly reticulate and gibbous. 

 b. Larger (8 to 9 mm. in length). 



c. Apex of the anterior edge of the posterior lateral lobes of the pro- 

 notum greatly produced and acuminate relicidatus Hancock. 



cc. Apex of the posterior lateral lobes but little produced. 



gihbinolus Bruner- 

 bb. Smaller (6.5-7 mm. in length). The posterior lateral lobes but little 



produced, nevertheless still angulate arcuatus sp. nov. 



AA. Pronotum comparatively smooth. The posterior angles of the lateral lobes 

 roundly angulate (7 mm.) uniformis Bruner. 



As seen by an examination of the above key, arcuatus has the pro- 

 notum moderately gibbous, but is smaller than the others. The pro- 

 notum is rather greatly elevated on its anterior half and evenly 

 arcuate and ascending from the front edge to the point of its greatest 



