NO. l6.] ORTHOPTERA OF CONNECTICUT. 67 



stouter than in the species of Tettix. The color may be a uni- 

 form grayish brown or the pronotum may be strikingly marked 

 with a design of velvety black. This is the most common of 

 our grouse locusts, and is found all over the state in dry pastures 

 and on hillsides where the soil is light and the vegetation is 

 scant. It can probably be found in every month of the year. 



Measurements. 



From various parts of the state from 27 April to 2 October. 



N. cristatus, var. carinatus Scudder. 



In the form carinatus the pronotum is prolonged and slightly 

 upturned at the end. The inner wings are also developed. 



Measurements. 



Total length Pronotum 



Female n-12.5 9.8-11.5 



Male 11-11.5 9.5-10.7 



Quite rare ; the collection contains two specimens as follows : 

 — West Haven, 11 May, Scotland, May (B. H. W.). 



Tettix Charpentier. 



This genus has the vertex of head projecting beyond the 

 eyes. Dorsum or top of pronotum flat. Median carina distinct 

 but not prominent. Superior lateral sinus nearly as deep as the 

 inferior. Wing covers in form of oval scales. Wings well 

 developed, usually as long or longer than the abdomen. 



Key to Species. 



Vertex with front margin rounded, median carina project- 

 ing (Fig. 8) ornatus 



Vertex with front margin angulate, median carina not pro- 

 jecting (Fig. 10) granulatus 



T. ornatus Say. Plate VII, 9. 



This species varies greatly in structure, color, and markings, 

 but can be readily distinguished by the characters given above. 

 A short-winged form was described as T. triangularis, but a 

 large series of specimens will usually grade from the typical 



