THE CANADIAN ENTOMOLOGIST. 337 



ADDITIONS TO THE WESTERN JASSID FAUNA. 



BY E. D. BALL, FORT COLLINS, COLO. 



Thamnotettix chiragrica, n. sp. — Form and size of T. parallela 

 nearly, superficially resembling Cicadula putictifro7is, var. Americana. 

 Length, 6 mm.; width, very nearly 2 mm. 



Vertex twice wider than long, half longer on middle than against 

 eye, disc convex slightly sloping, rounded to the face, front very broad 

 and short, width at base and length about equal, the disc convex. Pro- 

 notum a third longer than the vertex, over twice wider than long ; elytra 

 long, almost parallel margined to the apex, venation distinct, ajiical cells 

 short, their bases truncate, the anteapicals long. 



Colour: vertex pale greenish yellow, a pair of round black spots on 

 the posterior margin, slightly nearer the eyes than to each other, a pair 

 of larger, quadrate spots between the ocelli and the eyes, face pale 

 yellow, a few dark arcs on upper part of front, the upper bounding pair 

 crescentiform uniting on the tip of the vertex, a pair of black spots 

 above the antennal sockets and a black band margining the eyes below. 

 Pronotum olive, shading to yellowish in front, a pair of approximate 

 median spots on the anterior submargin, a larger pair against the eyes 

 and a pair of dots just inside the latter, on either side, black. Scutellum 

 pale yellow, a pair of round spots on the disc and a larger, triangular 

 pair just within the basal angles, black. Elytra dark fuscous, the veins 

 and margins milk-white in sharp contrast. Below pale yellow; ovipositor 

 and spot on the last segment black. 



Genitalia : ultimate ventral segment of the female three times the 

 length of the penultimate, the lateral margin roundingly narrowing, the 

 posterior margin roundingly emarginate, the disc posteriorly striated, the 

 middle half angularly elevated. 



Described from a single female from Phoenix, Ariz. This is so 

 distinct and easily-recognized a species that there can be no danger in 

 describing it from the single specimen. 



Thamnotettix Osborni, n. sp. — Form and general appearance of 

 Kennicottii, but smaller and lighter coloured. Length, 5 mm.; width, 

 1.25 mm. 



Vertex longer and narrower than in Kennicottii, less than twice as 

 wide as its middle length, disc convex, evenly rounding to the front ; 

 front long and narrow, scarcely narrowing until just at the clypeus, genae 

 scarcely angled, extending below the lorse. 



