TETTIGIDEA. 15 



TETTIGIDEA, Scudd. 

 Tettigidea, Scudder, Bost. Journ. Nat. Hist. vii. p. 476 (1862). 



This is the dominant genus of the group Batrachideae, numerous both in species and 

 individuals. Dimorphism in length of pronotum and wings is common, occurring in 

 the majority of the species of which I have seen any considerable numbers. In 

 consequence of this, and other reasons stated, it is extremely difficult to frame a 

 satisfactory key to the species, and the following must be looked upon as a tabulated 

 statement of the more obvious differences existing rather than as a practical key 

 to their determination. One species, T. guatemalteca, I have not been able to 

 satisfactorily identify, though it may be one of the forms here treated ; it is omitted 

 from the key, but the description of it as given by Bolivar is quoted in full. 



Key to Species. 



A. Vertex blunt, more or less truncate ; eyes prominent. 



B. Posterior sinus of the lateral lobes of the pronotum relatively 

 shallow ; vertex truncate. 

 C. Dorsum of pronotum smoothly granulate, horizontal, 



distinctly depressed at the shoulders bruneri, sp. n. 



CC. Dorsum of pronotum with conspicuous, nearly percurrent, 

 irregular longitudinal rugae ; horizontal or somewhat 

 depressed at the shoulders in the male, arched near the 



front margin in the female chichimeca, Sauss. 



BB. Posterior sinus of the lateral lobes of the pronotum of usual 

 depth ; vertex scarcely truncate ; pronotum granulate, hori- 

 zontal in the male, a little arched in the female nicaraguce, Brun. 



A A. Vertex a little advanced, subangulate; pronotum decidedly arched 



longitudinally plagiata, sp. n. 



AAA. Vertex advanced ; eyes not prominent. 



D. Vertex equal to or less than one of the eyes in width, the mid- 

 carina well-developed. Anterior margin of the pronotum little 

 produced, rounded. Surface smoothly granulate, rugulse barely 

 visible. Scapular area distinct, triangular, widest at the 

 humeral angles. A very small and slender sp'ecies .... parvula, sp. n. 

 DD. Vertex wider than one of the eyes. 



E. Scapular area absent. Surface smoothly granulate. Ante- 

 rior margin of the pronotum little advanced, rounded. 



Mid-carina of vertex feebly developed nigra, sp. n. 



EE. Scapular area present, narrow. Surface irregularly rugulose. 

 Anterior margin of the pronotum strongly advanced, 

 angulate, or rounded-angulate. Mid-carina of vertex 

 well-developed tecta, sp. n. 



