182 



Synoptical table of the genera. 



A. Proiiotum arched rouudly BatracMdea. 



AA. Pi'onotum nearly or quite horizontal : 



a. Antennae 13 or 14 jointed Tettix. 



aa. Antennae 22joiuted Tettigidea. 



Remark. — I have not studied the species of this sub-family with suf- 

 ficient care to determine their relations, and therefore will not attempt to 

 arrange them with more accuracy than what is -indicated by the short 

 descriptions found in the writings of the entomologists by whom they have 

 been described. I have placed in Tettix those species in which there is no 

 mention of characters which indicate that they belong to other genera. 



TETTIX, Fis€h. tie T^^ 



GnjUus bulla, Linn.; Tetrix, Latr. ; Peritrachelia, Fieb. (Ent. Mon.); Platy- 

 paryphen, Fieb. (Kelch., Orth. Obeschl). 



Head generally small ; face more or less unicarinate; eyes globular, some- 

 what prominent ; palpi short, filiform. Antenna? filiform, consisting of thir- 

 teen or fourteen joints, slightly distinct. Pronotum more or less horizontal, 

 extending back over the abdomen to or beyond its extremity ; the lower an- 

 terior angle of the sides angulated and bent inward ; the lateral carinas some- 

 what prominent, and convergent near the front border. Elytra short, squam- 

 ous, in the form of oval scales. Wings well developed, usually as long or 

 longer than the abdomen and slightly curving upward at the extremity. 

 Pronotum without any spine or tubercle. Species small. 



T. graiaiieata, Scudd., Can. Nat., VII. 288.' 



Syn., Acrydium granulatwn, Kirby, Faun. Bor. Am. Ins., 251. 

 Tetrix ornata, Harr., Kep., 3d ed., 186. 

 (Not Acrydium ornatwm, Say.) 



Cinereous, obscurely clouded with black, with the whole body granu- 

 lated with very minute, elevated, whitish points. Pronotum longer than the 

 abdomen, tricarinate. Tibias reddish, obscurely banded with white. 



Body black, sprinkled with numberless very minute, elevated points or 

 granules. Pronotum cinereous, clouded obscurely with black ; the middle 

 carina straight, and the lateral ones curved at the base. The rudiments of 

 the elytra cinereous, ridged, punctured wilh excavated punctures; nerves of 



