of the North American Orthoplera. . 475 



the front border nearly straight instead of angulated ; the 

 pronotum is shorter than in the preceding, and the wings 

 are smaller; both this and the preceding species have al- 

 most every conceivable variation of ornamentation, upon 

 which almost exclusively Harris established his specific 

 differences, but as Uhler has remarked, " color and style of 

 marking is of very little value in separating the species of 

 Tettix." 



Mass., (H. Coll., Sanborn, Shurtleff.) N. Hampshire, 

 (H. Coll.) Maine, (H. Coll., Packard.) Vermont, (S. H. 

 S.) Conn., (Norton.) S. Illinois, (Thomas.) St. Louis, 

 Missouri, (Sanborn, S. H. S.) 



* 3. T. TRIANGULARIS, nOV. Sp. 



Allied to T. ornala^ and agreeing with it in ornamenta- 

 tion, in the character of the vertex, the prominence of the 

 eyes, but differing in the length of the pronotum and wings ; 

 as in both of the preceding species, the pronotum and 

 wings are of equal length, but in this the pronotum is 

 scarcely longer than the body, and is not produced back- 

 ward into such a slender point, the sides being straighter ; 

 the breadth is contained three times in the length; it is a 

 smaller species than the preceding. 



Length of pronotum, .17 in. 2 $,2 9 . 



Mass., (S. H. S.) Maine, (Packard.) N. Hampshire, 

 (H. Coll.) 



* 4. T. cucuLLATA, BuriTi., Handb. d. Ent. ; H. 658. 



(1838.) 



Differs from T. granidata, which it most resembles, in 

 having the vertex very narrow, slightly less than the diam- 

 eter of the much inflated eyes, the front cut off square, and 

 slightly hollowed, not projecting outward so far as the 

 eyes; the pronotum is broader and more compact over 

 the thorax, more suddenly sloped off behind and extending 

 backwards nearly twice the length of the abdomen, the 

 wings overreaching slightly ; the punctures upon the 



