838 THE CANADIAN EMTOMOLOGIST. 



Colour very similar to Coquilletti, vertex and face pale creamy washed 

 with orange, ocelli and an irregular spot on either side the vertex at the 

 base, fulvous. Pronotura pale orange fulvous, a narrow transverse band 

 on the middle. Scutellum yellow, brownish or fuscous triangular spots 

 within the basal angles. Elytra fulvous, the anterior half of the corium 

 subhyaline, veins on clavus and the sutural margin narrowly white, claval 

 suture broadly white, with the band on pronotutn forming a long triangle. 



Genitalia : ultimate ventral segment of female half longer than 

 penultimate, posterior margin broadly rounding, sharply notched either 

 side of a strap-shaped, produced, median tooth ; male valve small, almost 

 concealed beneath the large ultimate segment ; plates narrow, triangular, 

 the sides convex at base, nearly straight beyond. 



Described from a number of specimens taken at Fort Collins and 

 Wray, Colo., and Kimball, Neb. This species is the western represen- 

 tative oi Kennicottii, with which it has formerly been confused. It maybe 

 distinguished by its smaller size and lighter colour as well as by the 

 distinct genitalia. 



Thavinotettix Heidemajini, n. sp. — Form of Cockerelli nearly, but 

 smaller, the head broader and blunter. Grayish green sprinkled with 

 blood red dots. Length, 4 mm.; width, i-r.25 mm. 



Vertex very slightly angled in front, twice wider at base than its 

 middle length, transversely depressed posteriorly, passage to the front 

 rounded, ocelli rather distant from the eyes, front parallel margined until 

 below the middle, then regularly narrowing to the clypeus, pronotum 

 scarcely twice the length of the vertex, elytra together wedge-shaped. 



Colour : vertex and face pale yellow, sutures and about five short 

 arcs on the front fuscous, pronotum pale olive, the anterior margin 

 lighter, scutellum yellow, and orange spot inside each basal angle. 

 Elytra milky subhyaline with a greenish cast, the black tergum showing 

 through. Whole upper surface and face minutely dotted with blood red. 



Genitalia : ultimate ventral segment of the female two and one half 

 times as long as the penultimate, the posterior margin broadly rounding 

 or slightly produced on the middle third ; male valve small, rounding, 

 about half the length of the ultimate segment, plates broad at base, 

 almost circularly rounding and then extending as a pair of style like 

 points, pygofers long, tubular, oblique, equalling or exceeding the plates. 



Described from eighteen specimens from Cerro Summit and Alder, 

 Colo., both high mountain points. 



