Bruner: South American Acridoidea. 83 



\ci\ gently depressed, about as long as (o") or a little less ( 9 ) than 

 its greatest width, the antero-lateral margins raised, the disk slightly 

 and irregularly rugose, not longitudinally sulcate, but with its anterior 

 portion a little lower than the bounding wall. Frontal costa viewed 

 lateral!) fairly prominent above, straight, continuous to the clypeus; 

 plain above the antennae, coarsely punctate and sulcate below. 

 Antenna' filiform, in the female a very little longer than the combined 

 length of the head and pronotum, in the male slightly longer than the 

 hind femora. Front quite profusely and strongly punctulate, the 

 lateral carina' 'prominent, divergent, and somewhal bowed below the 

 middle. Pronotum rather strongly punctulate, of about equal width 

 in front and behind, a little contracted laterally at middle, the trans- 

 verse sulci visible throughout, but not at all prominent, the last one 

 located decidedly back of the middle; median carina slight, but visible 

 throughout; anterior margin broadly and evenly rounded, the hind 

 margin obtusangulate, lower lateral margins strongly sinuate, the 

 posterior angle rounded. Pleura punctulate. Tegmina and wings 

 narrow, the former with about one-fourth (cf) or one-sixth ( 9 ) of their 

 length extending beyond the tip of the abdomen, their apex plainly 

 rounded. Hind femora moderately robust, evenly tapering, as long 

 as (9), or somewhat longer than (cf), the abdomen, the genicular 

 lobes acuminate; hind tibiae gently expanded apically, the lateral 

 edges plainly, but not greatly, lamellate; external row of spines, six, 

 the internal row, nine in number. Interspace between the mesosternal 

 lobes a little wider than long. Prosternal spine small, acuminate, 

 emanating from the rear of a low rapidly narrowing pyramidal base. 

 Male abdomen evenly and rapidly tapering, the last ventral segment 

 abruptly upturned and contracted at sides so as to form a small 

 pyramidal apex; supra-anal plate of peculiar form, the basal half 

 being a very heavily rimmed depressed semi-circle with two short 

 sub-parallel median carina; and a lateral basal tubercle of black; the 

 apical half a much narrower D-shaped projection which is also very 

 strongly rimmed. Cerci of the curved type typical of this group of 

 insects, the apical half slightly transverse and gently spatulate; valves 

 of the ovipositor short and rather strongly margined with teeth, the 

 outer margin of the upper pair provided with four prominent teeth. 

 Occiput, disk of pronotum, and dorsal edges of the folded tegmina 

 in the male dark olivaceous green, in the female tinged with brown; 

 sides of head back of eyes, upper half of sides of pronotum and upper 



