ACRIDIIDAE TRYXALINAE 31 



apical spur of inner side of same much 



less than half as long again as upper spur. 



Aulocara Scudder. 



& 2 . Generally smaller forms. Median 

 carina of prozona not cut by the trans- 

 verse sulci ; foveolae of male vertex sub- 

 equal, rhomboidal ; hind tibiae red ; lower 

 apical spur of inner side of same fully half 

 as long again as upper spur. 



Ageneotettix McNeill. 



j 2 . Median carina of the pronotum cut by 

 principal sulcus more or less plainly in front 

 of the middle, never behind ; summit of the 

 head furnished with a more or less distinct 

 median carina, which sometimes extends 

 nearly or quite to the tip of the vertex, and 

 is most distinct on the posterior part of the 

 scutellum; posterior part of the metazona 

 strongly angulate. 



k\ Lateral lobes of the pronotum fur- 

 nished with a single or double series of 

 short, irregular, and sometimes indistinct 

 carinae which extend from about the 

 middle of the anterior margin toward or 

 to the upper posterior angle ; also with a 

 second more distinct, low, broad, light- 

 colored carina which extends from the 

 middle of each lobe toward the lower 

 posterior angle ; sometimes this carina is 

 distinct only at the anterior end; face 

 nearly perpendicular, rarely very mod- 

 erately inclined ; frontal costa sulcate 

 throughout, acuminate at the vertex and 

 regularly divergent below. 



Stirapleura Scudder. 

 k 2 . Lateral lobes of the pronotum desti- 

 tute of carinae ; face distinctly and con- 



