23 



ce. Wings transparent. Basal joints of antenna' not depressed. 

 Lateral carina' of pronotnni nearly parallel. Tegmina with 

 the intercalary vein more or less plainly developed. 



STAUKORHECTUS Giglio-Tos. 

 bb. Inner apical spurs very une<iual in length. Antenna' of neither 

 sex anywhere near as long as hind femora, 

 c. Lateral "foveohv of the vertex well developed, once antl a half to 

 twice as long as broad. The lateral lobes of pronotum fiir- 

 nislied with a rather broad, smooth raised, light-colored carina 

 a little below the middle. STIKAPLEUKA Scudder. 



cc. Lateral foveola^ of vertex obscure, linear. J^ateral lobes of pro- 

 notum without raised line or carina, 

 d. L rger. Lateral carin.-e of pronotum more or less interrupted 

 between anterior and posterior sulci: divertjing strongly an- 

 teriorly and posteriorily. PLECTROTETTIX AIcNeill. 

 dd. Smaller. Lateral carina' of pronotum but little or not at all 

 interrupted: diverging but little. 



EUPLECTKOTETTIX Bruner. 



GENUS HYALOPTERIX, CHARP. 



TABLE FOR SEPARATION OF THE SPECIES. 



A. Size large. Pronotum behind distinctly angulate, lateral carina' 

 continuous, straight. Wings with the posterior field red, in male 

 the anterior field broadlj' tlilated, the anterior margin distinctly 

 rounded, the fenestrate area very l)road. Tegmina of male broader 

 than the length of pronotum. Last ventral segment of male 

 a))domen long. riiripeiiiiis Charp. 



AA. Size small. Pronotum behind rounded to roundly angulatetl, late- 

 ral carina' not continuous, being more distant on posterior than 

 anterior lobe. Wings entirely subhyaline, the fenestrate area of 

 male less wide. Tegmina of male narrower than length of prono- 

 tum. Last ventral segment short. gTacilis Giglio-Tos. 



H. rufipennis Charp. Perhaps this insect occurs in 

 northern Argentina, although not definitely recorded from 

 the immediately adjoining regions. 



H. grdcins Giglio-Tos. San Lorezo, Jujuy (Giglio-Tos.) 



GENUS METALEPTEA, BRUNNER. 



I\f. hrevicornis Linn This insect is found throughout the 

 Republic north of the Rio Colorado, especially along the 

 eastern border. (Schulz, Stempelmann, Thomas, etc.) 

 Jujuy. (Giglio-Tos.) 



GENUS ORPHULA, STAL. 



0. jKigana Stal. Formosa, Chaco and Asuncion. (Brun- 

 ner, Schulz.) 



