Bruner : South American Acridoidea. 131 



n> taint traces on upper edge. Vertex much wider than normal in 

 members of the genus. Head and anterior lobe of the pronotum 

 smooth, s< .iiv<l\ at all punctulate. 



Mead of moderate size, slightly wider than the anterior edge of the 

 pronotum, the occipul well rounded and gentlj elevated above the 

 plane of the pronotum; eyes not at all prominent, scarcely if an\ 

 longer than the anterior edge of the thee' -, mil uated at the 

 b\ .1 -pare fully one' and one-half times the width of the frontal 

 between the antenna'; fastigium depressed, scarcely sulcate even 

 anteriorly, the antero-lateral margins reaching as carina? a trifle more 

 than half way to the eyes; fronted COSta fairly prominent between the 

 antenna' where it is plane, coarsely punctulate*. and about twice the 

 width of the second antennal joint, at the ocellus a little contracted, 

 below gently expanded, and somewhat sulcate to the base of the 

 clypeus. Facial or lateral carina' fairly prominent and about parallel. 

 Antenna moderately robust, the joints a little depressed on upper side, 

 lather profusely and strongly pitted, somewhat longer than the head 

 and pronotum combined. Pronotum a little contracted at middle, 

 iding posteriorly, the anterior middle rounded, the hind margin 

 broadly angulate; median carina obliterated in front, present, but 

 faint on the hind lobe, the two lobes about equal in lengt h. Tegmina 

 and wings fully developed, plainly surpassing both the femora and the 

 apex of the abdomen, the discal field provided with a prominent inter- 

 calary vein. Hind femora fairly robust, or about normal, extending a 

 little beyond the tip of the abdomen, the tibiae strongly hirsute, nine- 

 spined on the outer edge. Middle and anterior femora but little 

 inflated. Interspace between the mesosternal lobes a little longer 

 than wide; prosternal spine robust, somewhat compressed from the 

 sides, and directed to the rear. Abdomen gently clavate, the last 

 ventral segment triangular, about as long as its basal width, the apex 

 entire, bluntly rounded; supra-anal plate broadly and roundly tri- 

 angular, the lateral margins a little thickened and gently upturned, 

 the disk widely and profoundly sulcate at base, where the marginal 

 apophyses from the preceding segment project as short blunt pro- 

 tuberances within the sulcation. Cerci heavy at base, but suddenly 

 narrowed beyond the basal fifth, directed backwards and upwards 

 and gently bowed inwards, the apical third somewhat flattened and 

 sulcate externally, the apex obliquely docked from above, total length 

 nearly a third greater than that of the supra-anal plate. 



