454 GEOLOGICAL SUEVEY OF THE TEERITORIES. 



C. griseus, uov. sp. 



Head quite large ; occiput elevated. Dark gray, with fuscous and 

 yellowish spots. 



Female. — Occiput unusually convex and prominent; seen from the 

 side, the top of the head rises considerably above the disk of the pro- 

 notum; lateral carinse of the face but slightly divergent. Posterior 

 lobe of the pronotum densely punctured. Elytra passing the abdomen 

 one-fourth their length. Upper and lower valves of the ovipositor 

 slender, without any lateral angulations, not much excavated. Pos- 

 terior femora i)assing the abdomen. Prosternal spine short, obtuse, 

 and slightly transverse. 



Color. — Face lurid, with numerous small, black spots. Occiput and 

 pronotum gray, with a slight brassj^ tinge, irregularly spotted with 

 black ; behind each eye, reaching to the last cross-incision of the prono- 

 tum, is an interrupted, broad, piceous stripe; the sides of the prono- 

 tum below this are somewhat lurid. Elytra dark gray; nervules whit- 

 ish, marked somewhat regularly with subquadrate black or fuscous 

 spots^ not confined to the middle field, but extending equally above and 

 below, becoming dimmer toward the extremity, but distinct. Wings 

 (not spread in the only specimen seen) appear to be dusky toward the 

 apex. Posterior femora with three yellowish bands ; rest of the disk 

 black, sulcus beneath, and interior carina bright red ; tibiae purplish- 

 red beneath, with a pale ring near the base ; spines black; legs hairy. 

 Venter yellowish. 



Dimensions. — Length to tip of the elytra, 1.08 inches; elytra, .76 

 inch ; posterior femora, .52 inch ; posterior tibiae, .45 inch. 



Ohio, (from Mr. Dodge's collection.) 



Pezotettix,* Burm 



Including the new species herein described, there are eleven species 

 belonging to this genus found in the United States that have been deter- 

 mined and named, four of which are found west of Missouri, to wit: 

 P. BorcTcii, Stal., P. picta, Thos., P. obesa, Thos., and P. N'ehrascencis, 

 Thos. 



P. ohesa, uov. sp. PI. II, fig 13 and 14. 



Prosternal spine very short and obtuse ; body of the female robust, fleshy; 

 elytra and wings wanting. 



Vertex broadly sulcate, the raised margins slightly angulate in 

 front of the eyes, and continuous with the margins of the frontal 

 costa ; frontal costa broad, flat, and slightly sulcate at the ocellus, 

 not reaching the clypeus; lateral carinse distinct but not prominent. 

 Pronotum short, expanding slightly posteriorly, truncate; the median 

 carina distinct, continuous ; lateral carinse scarcely distinct on the 

 posterior lobes, more distinct on the front lobes ; transverse impressed 

 lines indistinct ; truncate in front and behind ; the posterior mar- 

 gin straight like the posterior margin of an abdominal segment, (in 

 fact, the parts of the thorax look almost exactly like the abdominal seg- 

 ments,) not covering the meso-notum, but extending only to the middle 



* Walker (Cat. Dermap. Salt.) lias restored Po(?is3Jia,Latr., Avliich probably has priori- 

 ty, but I retain Burmeister's name, as we thus do away with a number of synonyms. 

 This genus does not appear to be well defined, and it is extremely difficult* to detor- 

 miae the line of demarkation between it and Caloptenus. I am of the opinion that tlie 

 I)osterior lateral margins of the pronotum will afford a good character, as the true 

 Fezotettirji which I have seen appear to have these straight without an entering angle 

 at the humerus. 



