NO. I4(;i. LIST OF PARA G IJA YAN LOCUSTS— BR VNER. 667 



As compared with the male it is much more robust, has a larger head, 

 broader and shorter fastigium of the vertex, less prominent eyes, the 

 pronotum is more coarsel}' rugose, the tegmina arc a])breviated, being 

 onl}" about one-half as long instead of a trifle longer than the abdo- 

 men. The antennae of the female are also correspondingly shorter 

 than in the opposite sex, as are also the hind femora. The valves of 

 the ovipositor are not abnormally' developed, l)eing of the ordinary 

 type in species of allied genera. In color the sexes are similar, save 

 that perhaps the females will average a little paler, and in lacking to 

 some extent the row of prominent discal spots of the tegmina. 



Length of bodj', female, 54, of pronotum, 11, of tegmina, 20, of 

 hind femora, 21 nmi. 



Ilahitdf — Sapucay, Paraguay, W. T, Foster, 9 males and 3 females 

 collected in February. 



This genus seems to have some of the characteristics of the Zonio- 

 podfe, but lacks the terminal spine on the outer carina of the hind 

 tibias. It also resembles in other respects the genus Aleuas which lat- 

 ter genus lacks the terminal spine. Possibly too nuicli stress has been 

 placed b}^ some orthopterists on this spine feature in the arrangement 

 of the genera. I would also suggest the same with reference to the 

 comparative length of the first and second joints of the hind tarsi. 



ALEUAS Stal. 

 ALEUAS VITTICOLLIS Stal. 

 Aleuas vitticoUis StAl, Syst. Acrid., 1878, -p- 69. 



Hahitat. — Sapucay, Paraguay, 2 males, W. T. Foster, collector. 

 Reported also from this country by James A. G. Rehn. 



The following table for the separation of the species of Aleuas will 

 give an idea of the relationship of the previousl}' described forms of 

 the genus, together with the one now characterized: 



TABLE FOR DET1]RMINATI0N OF SPECIES. 



a. Hind tibite armed externally with 6 or 7 spines. Wings either fnlly developed 

 or more or less abbreviated. Pronotum strongly rugose-punctate. 

 h. Tibiaj normally with but 6 spines on the outer margin. 



c. Tegmina slightly surpassing the ajiices of the hind femora vittiroUls Stal 



c<: Tegmina much abbreviated, less than half as long as the abdomen. 



brachyjiterns, new species 

 bb. Tibite with 7 spines on the outer margin. Tegmina and wings surpassing tip 



of the abdomen gracilis Stal 



aa. Hind tibiae armed externally with 8 or 9 spines. Wings always fully developed. 

 Pronotum not rugose, punctate Uneatus Stal 



ALEUAS BRACHYPTERUS, new species. 



Like the previousl}^ known species of the genus this insect is pre- 

 vailingly green or greenish olive in color. Its i)ronotum has the 

 median carina and a line on either side continuous from the hind mai'- 



