54 TETTIGW.E OF NORTH AMERICA 



more rarely twelve articles, not reaching the humeral angles, 

 viewed in profile inserted barely in front of the anterior inferior 

 border of the eyes. Dorsum of pronotum more or less com- 

 pressed, between the shoulders rather narrow; median carina 

 strongly cristate and longitudinally more or less arcuate; 

 antcro-dorsal margin of pronotum advanced upon the head, 

 angulate, posteriorly cuneate, most rarely subulate; lateral 

 lobes of pronotum bisinuate posteriorly, the infra humeral 

 lateral sinus shallow, the inferior lateral sinus deep, angulate, 

 the median lobule between the two feebly developed, the pos- 

 terior inferior angle obtuse angulate. Elytra narrow acuminate. 

 Marginal carinje of anterior and middle femora entire; pos- 

 terior femora more or less stout; carina; of posterior tibije 

 multispinose, the first tarsal article longer than the second and 

 third combined. 



Tettix, Harris: Batrachidea, Scudder, Nat. Mon. N. Am. 

 Orth., 478 (1862), Bost. Jour. Nat. Hist.; Thomas Synop. 

 Acrid. N. Am., 189 (1873); Fernald, Orth. N. Eng., 48 

 (1888), separate; Tettix, Bolivar, Essai (260), 86 (1887); 

 Nomotettix, Morse, Psyche, Oct., 150(1894); Hancock, Ent. 

 News, June, 135 (1898); Scudder, Guide N. Am. Orth., 189 

 (1873); Hancock, Psyche, Jan. 6 (1900). 



DISPOSITION OF SPECIES. 



1. Vertex shallowly fossulate on either side of the 



median carina opposite anterior portion of the eyes; 

 antero-dorsal margin of pronotum, viewed from 

 above, obtuse angulate; body rugose. 



2. P"ace strongly retreating; body very small. 



parvus, Morse. 



3. Vertex, viewed from above, with front border strongly 



angulate; body larger. aciiiiiinaius, Hanc. 



4. Anterior border of vertex convex; face moderately 



retreating, ampliate. s/i/u/ro/is, Hanc. 



I. I. Vertex quite deeply longitudinally fossulate on either 

 side of the median carina opposite anterior portion 

 of the eyes, frontal carina laterally compressed. 



