466 



BOARD OF AGRICULTURE. 



Synopsis of the Tettiginoe. 

 , f Pronotum arched roundly Batrachidea. 



\ Pronotum nearly or quite horizontal 2. 



„ / Antenna3 with thirteen or fourteen joints . . . Tettix. 



\ Antennae with twenty-two joints .... Tettigidea. 



Genus Tettix. Fischer (1853). 



Head generally small ; eyes globular, somewhat prominent ; 

 antennoe composed of thirteen or fourteen joints, filiform ; prono- 

 tum extending back over the abdomen to or beyond its extremity ; 

 the lower anterior angle of the sides angulated and bent inward ; 

 the lateral carinae somewhat prominent, convergent near the front 

 border. Wing covers short, in the form of oval scales. Wings 

 well developed, usually as long or longer than the abdomen, and 

 slightly curving upward at the end. Pronotum without any spine 

 or tubercle. Species small. 



The species may be separated as follows : — 



r Length about half an inch . . . . 



\ Length about one-fifth of an inch 



r Length to tip of wings, .55 to .GO of an inch 



I Length to tip of wings half an inch or less . 



/ Pronotum advanced to the eyes 



I Pronotum not advanced to the eyes 



triangularis. 



granulatus. 



3. 



cucullatus. 



ornatus. 



Tettix granulatus. Kirby. 

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

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

 than the abdomen, tricarinate. Tibiae reddish, ob- 

 scurely banded with white. Body black, sprinkled 

 with numberless very minute elevated points or gran- 

 ules. Pronotum cinereous, clouded obscurely with 

 black ; the middle carina straight, and the lateral ones 

 curved at the base. The rudiments of wing covers 

 cinereous, ridged, with excavated punctures ; nerves of 

 the wings black, those of the costal area white. The 

 fore anterior tibiie reddish, obscurely anuulatcd with 

 white. Length, nearly half an inch. 



Tettix ornatus. Say. 

 Smaller than T. r/ramdatas; vertex but little in advance of the 

 eyes, and front border nearly straight, instead of angulated. Pro- 

 notum shorter than in the preceding ; wings smaller. Both this 

 and the preceding species have almost every conceivable variation 



