AC RIDIID AE — TR YX ALIN AE 2 7 



e-. Teo-mina not exceeding the abdomen even in the 

 male. 

 y\ Lateral foveolae of the vertex linear and distinct ; 

 tegmina quite unspotted ; inner spurs of posterior 

 tibiae equal. . . . JVapaia McNeill. 



f^. Lateral foveolae less distinct and subtriangular or 

 obsolete ; tegmina more or less distinctly spotted as 

 well as the face and pronotum ; inner tibial spurs 

 very unequal, the longer but little shorter than the 

 first tarsal joint. . . . 02Mia McNeill. 



d^. Antennae never triquetrous, sometimes plainly de- 

 pressed basally and acuminate, most commonly filiform, 

 rarely clavate ; pronotum with the lateral lobes less dis- 

 tinctly vertical, with the lateral carinae very rarely quite 

 straight, but gently or strongly sinuate near the middle ; 

 median carina of the pronotum generally cut in or not far 

 behind the middle. 



e ^ Tempora either foveolate or plane, not visible from 

 above, 

 y^ Scutellum of the vertex with a distinct median 

 carina, which is usually a coarse raised line stronger 

 anteriorly. 



ff'^. Spurs on the inner side of posterior tibiae very 

 unequal, the apical spur being twice as long as the 

 other. 



h ^ Antennae dejjressed basally and distinctly 

 acuminate ; no supplementary carinae present 

 either upon the head or disk of the pronotum. 



Pedeticum McNeill, 

 /i^. Antennae depressed apically and somewhat 

 clavate ; supplementary carinae accompanying 

 the median carina upon either the head or the 

 disk of the pronotum. . Eritettix Bruner. 

 g ". Spurs of the inner side of the posterior tibiae 

 about equal in length. 



h \ Spines on the exterior margin of the pos- 

 terior tibiae 19-21. . . Syrbida Stal. 



