LAWSON: KANSAS CICADELLID^. 137 



Color: About like frontalis except for the dark face. Vertex with 

 three apical white lines and two faint basal and median ones, the latter 

 between a pair of white spots near the apex, and another pair near 

 their base. Face irrorate with brown, with short, light, oblique marginal 

 lines. Pronotum irrorate with brown and with traces of five light, longi- 

 tudinal lines. Scutellum brown with two large orange spots between 

 which are two broken, white, longitudinal lines, the apex light. Elytra 

 heavily irrorate with brown, costal region lighter, dark nervures usually 

 narrowly light margined, many cells with white spots. 



External genitalia: De Long describes the female genitalia as fol- 

 lows: "Last ventral segment of female long, slightly keeled, posterior 

 margin roundingly produced, pygofers constricted near base, broad and 

 rather short." Male, last ventral segment angularly excised posteriorly; 

 valve large, nearly as long as broad, posteriorly roundingly pointed; 

 plates broad basally, median length less than that of the valve, spiny- 

 margined, subacute apically, completely hiding short pygofers. 



Distribution: The only Kansas record for this species is that 



of the five male type specimens taken in Pottawatomie county. 



Hosts: De Long records sweeping this species from weeds. 



Genus Deltocephalus Burm. 



To this genus belong medium-sized or small species charac- 

 terized chiefly by the shape of the head in which the vertex 

 is acutely triangular, usually longer than broad, though often 

 wader than long, disc flattened or convex and separated from 

 the front by more or less of a distinct margin. The front is 

 broad and the clypeus is narrowed at the tip. The elytra may 

 be long or short, usually having five anteapical and three apical 

 cells, and two cross nervures between the sectors. All the 

 members of this genus are grass feeders. 



Twenty-one species of this genus have been taken in Kansas 

 and five other probable native species are included in the key. 



KEY TO SPECIES.* 



a. Vertex rather angularly produced, disc flat or concave, definite mar- 

 gin between vertex and front. 

 B. Pronotum short, more than twice broader than long, elytra 

 without a distinct appendix. 



C. Elytra moderately long, two outer apical veinlets 

 strongly reflexed, the next one meeting the costa at 

 nearly right angles. 

 D. Pronotum with distinct, black, longitudinal lines. 

 E. Vertex longitudinally lined or spotted. 



bilineatus. 



EE. Vertex transversely lined before the eyes. 



albidns. 



* Adapted from keys by Osborn & Ball, Proc. la. Acad. Sti., iv, p. 198, 1897, and 

 DeLong, Tenn. St. Bd. Ent., Bui. 17, p. 42, 1916. 



