200 Journal New York Entomological Society. [VoI. vii. 



readily separated from it by the narrow shoulders and shallow posterior 

 lateral sinus. 



Tettix tentatus, sp. nov. 



Stout, with the general appearance of a large N'omotettix, to which genus this 

 species and T. acadicits are apparently allied by the frequently shallow form of the teg- 

 minal sinus. Vertex resembling that of T. granitlatits, more than twice the width of 

 an eye, much advanced in front of eyes and obtuse-angled, the carina not at all or barely 

 projecting ; crown with the sides excavate opposite the anterior middle portion of eyes 

 and slightly broadened anteriorly, rather flat, sulcate anteriorly on each side of the 

 moderately developed carina, convex posteriorly, without occipital mammillee. The 

 face in profile is very similar to that of Nom. parvus but is less deeply excavate op- 

 posite the eyes. Pronotum rather shai-ply tectiform ; the mid-carina high, sub-com- 

 pressed, in profile convex opposite shoulders, horizontal or a little upturned pos- 

 teriorly ; anterior margin very obtuse-angled, nearly truncate ; hind process barely or 

 considerably passing hind femora, its sides nearly straight ; wings equalling or slightly 

 passing the pronotum. 



Measurements. Total: $, 10.3; 9> II-4-I4-5- Pronotum: $, 9.3; 9, 

 10. 5-12. H. fem.: ^,5.6; 9,6-6.6. Width of shoulders : ,J , 3 ; 9,3-5- An- 

 tenna: <y , 3 ; 9> -■S~l>- Pi'on. passes H. fem.: .3-2.5 mm. 



Described from 1^,5 99.1 9 , Oregon (Scudder) ; i 9 , Lag- 

 gan, Bean (Scudder) ; i 9 , Green River, Wyo., Garman (M. C. Z. ) ; 

 I 9 , Laggan, Wickham (Bruner) ; i $ , \ 9 , Tennessee Pass, Colo. 

 (Bruner). 



This species resembles T. acadiciis but may be distinguished from 

 it by the angulate (instead of toothed) vertex in dorsal view and the 

 flatter face in profile, the frontal costa being less protuberant opposite 

 lower part of eyes. These two species are apparently on the border- 

 land of the genus, presenting characters allying them to Nomotcttix. 

 Tentatus was first distinguished four years ago, from three specimens ; 

 three additional specimens, representing both sexes, coming to hand, 

 I have now no hesitation in describing it. 



Tettix hancocki, sp. nov. 



Allied to T. ornatus from which it differs in its more robust form with wider and 

 generally more projecting vertex, slightly more prominent mid-carina, in the gen- 

 erally more abruptly forked and wider facial costa, and notably in the enlarged middle 

 femora ; the expanded poi^tion of the latter in the male is nearly or quite one-half as 

 broad as long (in ornatiis seldom more than one-third), in the female the difierence 

 is less noticeable. The humeral angles of the pronotum are more pronounced and the 

 mid-carina is a little more elevated in its anterior portion. Dimorphism in wing- and 

 pronotum-length occurs, the specimens (and sexes) before me (19 ^ (J, 27 9 9)' 

 being about equally divided between the two forms, with a few of intermediate char- 

 acter. For the short-winged form the trinomial T. Ii. abbreviatiis may be used. 



