THE CANADIAN ENTOMOLOGIST. 305 



the vertex, the margin bluntly rounding, the apex nearly acute. Front 

 wedge-shaped, less than half longer than wide. Elytra long, closely ap- 

 pressed behind. 



Colour: Vertex and face pale lemon-yellow, a black spot outside the 

 lorae on either side. Pronotum green, the margins pale yellow. Scutellum 

 pale yellow. Elytra deep brownish-black back to the apex of clavus, then 

 green to just before the apical cells, which are smoky-subhyaline. The 

 whole elytra iridescent. Legs and below pale. 



Genitalia : Female segments two thirds as long as its basal width, 

 gradually narrowing from the base to two-thirds its width. Posterior 

 margin with the median half shallo^^ly angularly excavated and strongly 

 black-marked, the lateral angles rounding. Male valve short, very obtusely 

 triangular, plates together triangular, longer than the basal width, the 

 lateral margins rounding, a black line at the base on either side. 



Described from eight examples from Colfax, California, and Medford, 

 Oregon^ collected by tlie author. The broad black saddle in sharp con- 

 trast to the yellow-green renders this a strikingly distinct species, 



Thamnotettix vapida, n. sp. 



Size and form of infuscata nearly. A large mottled-brown species 

 with the vertex lighter. Length, female 6 mm.; male 5.75 mm. 



Vertex broad, obtusely angulate, apparently almost rounding, with the 

 apex produced, but slightly longer on the middle than against the eye, 

 nearly twice wider than long, scarcely the length of the pronotum. Front 

 broad, flat, retreating, wedge-shaped, union with vertex narrowly rounding. 

 Elytra long, oftentimes flaring, venation simple, often one or two extra 

 nervures from the outer anteapical cell to the costa. 



Colour : Vertex straw-yellow, a pair of oblique dashes at the apex, a 

 pair of round spots at base and sometimes a line from the ocelli to the 

 middle of the disc brown. Face pale, the sutures brown, the front smoky 

 with pale curved arcs, the upper bounding pair visible from above on the 

 vertex margin. Pronotum pale, all but the anterior margin finely sprinkled 

 with milky and rusty brown. Elytra milky subhyaline, finely and irregu- 

 larly irrorate with rusty brown. 



Genitalia : Female segment as long as its basal width, narrowing from 

 the base, the posterior margin slightly rounding, with the median half 

 angularly emarginate, the emargination one-half as deep as its width. 

 Male valve transverse, scarcely angled ; plates together triangular, scarcely 

 as long as the basal width, gibbous at base, then narrowing to the blunt 



