268 THE CANADIAN ENTOMOLOGIST. 



In Mr. Gillette's material was an example of a species I take to be 

 Mr. Uhler's Jassus ( Thanmotettix) Icetus, but it differs from his des- 

 cription in wanting the minute fuscous dots at the tip of the vertex, and 

 the black basal spots on the scutellum. In this specimen, a female, the 

 last ventral segment is cylindrical, a little longer than the preceding and 

 feebly arquated behind without a median notch. Clypeus slightly 

 narrowed apically, its sides rectilinear. 



4. Thamnotettix montanus, n. sp. 



Allied to Th. clitellaria, Say. Smaller ; dark brown or blackish, face 

 pale. A transverse band on the pronotum and a small spot on the 

 elytral suture yellowish-green, polished. Length 4^ mm. 



Female : Head obtusely rounded before, soiled white or yellowish, 

 base of the vertex with a transverse fulvous-brown band between the eyes 

 covering the apical one-half of the pronotum, ocelli fulvous ; front with 

 a few short brown arcs next the edges, the sutures blackish, clypeus 

 slightly widened apically ; cheeks infuscated below the eyes. Pronotum 

 polished, pale greenish-yellow on the posterior one-half, hind edge feebly 

 concave. Scutellum dark brown, blackish on the base and apex, the 

 impressed line black. Elytra blackish, costal half of the corium as far as 

 the apical areoles hyaline, apex of the clavus and its nervures black, 

 sutural edge with an oblong greenish spot. Beneath black. Legs 

 whitish. Abdomen black ; connexivum, a slender median line on fourth 

 and fifth, apex of the ultimate, and the narrow edges of all the ventral 

 segments, and the oviduct, pale yellowish. Last ventral segment deeply 

 cleft either side of the ligulate median projection, the shorter lateral lobes 

 rounded, retreating at the outer angles. Male : More deeply coloured, 

 scutel and elytra black ; abdomen black, connexivum and ventral 

 segments narrowly edged with yellow. Valve half the length of the last 

 ventral segment ; plates nearly three times the length of the valve, 

 punctured, obtuse, suture straight, outer edge feebly convex; py gofers 

 exceeding the plates, pale, as is the apical half of the plates. 



British Columbia ; Mountains of northwestern Colorado. Described 

 from a fine pair received from Prof. Gillette and one male received from 

 Mr. W. H. Harrington and labelled " British Columbia." This latter 

 differs from the Colorado male in being more deeply coloured, with the 

 transverse band between the eyes black, and showing two small transverse 

 spots on the base of the front. 



Mailed October 13th, 



