ACRIDIIN^l. 213 



angle. Pronotum not at all, or but little, dilated 

 posteriorly; the lower edge of sides straight on the 

 posterior half, emarginate on the anterior half. 

 Tegrnina narrowed towards the apex. 



69 (70). Pronotum cylindrical, the dorsum straight, viewed 



laterally, the metazona not elevated. Frontal costa 

 below the ocellus and the lateral carinse of the face 

 subobsolete. Eyes rather oblique, less prominent . . Stenopola, Stal. 



70 (69). Pronotum gently dilated posteriorly, the dorsum when 



viewed laterally sinuate, subselliform, the metazona 

 gently elevated, the humeral angles rather distinct. 

 Eyes less oblique and strongly prominent Henia, Giglio-Tos. 



71 (66). Posterior margin of the pronotum obtusangulate. 



72 (73). Angle of the posterior margin of the pronotum entire, 



not incised. Tegrnina greatly surpassing the hind 

 femora. Frontal costa moderately prominent between 

 the antennse, subdilated. Eyes rather strongly con- 

 vergent and somewhat remote from the front edge of 

 the pronotum. Tegrnina with their apices sub- 

 acuminate Cornops, Scudder. 



73 (72) . Angle of the posterior margin of the pronotum greatly 



incised. Tegrnina not surpassing the hind femora. 

 Frontal costa subobsolete below the ocellus, not 

 sulcate; fastigium of the vertex declivant .... Tetratjenia, Stal. 



74 (59). Posterior tibise not, or but little, expanded apically, the 



margins rounded. 



75 (80). Hind tibise with three or four of the spines on apical 



portion of outer row decidedly larger than the others 

 and separated from them by a greater space, the 

 number usually six, but sometimes seven to ten. 



76 (77). Fastigium of the vertex short. Prosternal spiae broadly 



transverse and blunt. Outer tibial spines six in 



number, three basal, three apical Copiocera, Burmeister. 



77 (76). Fastigium of the vertex longer. Prosternal spine am- 



pliated apically, the apex flattened and the margin 

 acute. Outer tibial spines about ten, three apical. 



78 (79). Antennae arising considerably in advance of the eyes. 



Tegrnina very long and pointed. Disc of wings black 

 or fuliginous. Fastigium of the vertex long and mitri- 

 form, as long as the occiput Episcopotettix, Rehn. 



79 (78). Antennae arising only slightly in advance of the eyes. 



Tegrnina lobiform, lateral. Fastigium of the vertex 



shorter than the occiput, its sides nearly parallel . . Eucopiocera, Bruner. 



