Bruner: Saltatorial Orthoptera. 17 



The representatives of the genus Paiirotarsiis are rather hirge 

 insects for the group of locusts to which they belong, and bear a 

 general resemblance to some of the species of Tettigidea. Three 

 species have been recognized thus far. These may be separated by 

 the annexed synoptic key: 



A. Carinae of the frontal costa very heavy, almost obliterating the otherwise 

 moderately wide sulcus (Brazil). 

 b. Frontal costa strongly protuberant, the anterior margin of the frontal 

 disc decidedly angulate, median carina depressed between the humeri; 

 hind femora more elongate and slender; the caudal metatarsal joint 

 less than a third longer than the distal joint (Brazil). . .insoliius Rehn. 

 bb. Frontal costa only moderately protuberant, the anterior margin of the 

 pronotum not decidedly angulate, the median carina between the 

 humeri not noticeably depressed; hind femora more robust and less 

 elongate; the caudal metatarsal joint fully twice as long as the 



distal joint amazojms Hancock. 



AA. Carinse of the frontal costa only moderately heavy, leaving the sulcus fairly 

 wide (Island of Trinidad) rugostis Bruner. 



23. Paurotarsus amazonus Hancock. 



Paarolarsus amazonus Hancock, /. c. 



299, Mana River, French Guiana, May, 1917, C. M. Ace. No. 

 6008. 



Family EUMASTACID.^L. 



Genus Eumastax Burr. 



Eumastax Burr, Essai sur les Eumastacides, pp. 43, 45 (1899); Ib., Gen. Ins., 

 Fasc. 15, Orth. Eumastac, p. 15 (1903). 



24. Eumastax vittata Burr. 



Eumastax viltata BuRR, Essai sur les Eumastacicides, pp. 44, 46 (1899); Kirby, 

 S^-n. Cat. Orthopt., Ill, p. 76 (1910). 



A single male specimen of this species is at hand. It comes from 

 Quatro Ojos, Department of Santa Cruz, Bolivia, where it was taken 

 in November, 1913, at an elevation of 300 meters above sea-level 

 by J. Steinbach. There are also two males and two females in the 

 collections, which come from Buena Vista, eastern Bolivia, and were 

 taken in February, 191 5, by J. Steinbach. C. M. Ace. No. 5573. 



25. Eumastax tenuis (Perty)? 



Mastax tenuis Perty, Delect. Anim. Brasil, p. 123, tab. XXIV, fig. 3 (1830). 

 Mastax virescens Westwood, Arc. Ent., I, p. 100 (1841). 



ANN. CAR. MUS., XIII, 3, DEC. 4, I92O. 



