LAWSON: KANSAS CICADELLID^. 177 



terior one. Scutellum yellow, with two brown spots on the disc. Elytra 

 fuscous or nearly black, margins and all nervures but those of the apical 

 cells broadly greenish-yellow. Face pale with dark spot on apex of front, 

 dark stripes on margins of front and on clypeus, forming a black Y. 



External genitalia: Female, last ventral segment half longer than 

 preceding, composed of two membranes, the rounding lateral angles only 

 of the inner one showing from under the posteriorly narrowed outer 

 membrane, whose posterior margin is slightly emarginate with sometimes 

 a very small median lobe; pygofers robust, nearly or fully equalling the 

 ovipositor, sparsely spiny. Male, valve broad, as long as last ventral 

 segment, posterior margin rounding; plates together forming a triangle 

 about as broad as long, spiny margins convexly narrowing to acute apices 

 which exceed the spiny pygofers. 



Distrihutioii : Taken in Cherokee, Douglas and Riley coun- 

 ties. 



Hosts: A very common blue-grass species. 



Euscelis bicolor (Van D.). 



(PI. 13, figs. 1-2.) 

 Athysanus bicotor Van D., Can. Ent., xxiv, p. 114, 1892. 

 Deltocephahis virgulatus Uhl., Proc. Zool. Soe. Lond. for 1895, p. 78. 

 Athysanus bicolor O. & B., Proc. la. Acad. Sci., iv, p. 222, 1897. 

 Athysaiius bicolor O. & B., Proc. Dav. Acad. Sci., vii, p. 91, pi. 5, fig. 2. 1897. 

 Athysanus bicolor O. & B., Ohio Nat., ii, p. 251, 1902. 



Athysanus bicolor Osb., U. S. Dept. Agr., Div. Ent., Bui. 108, p. 92, fig. 23, 1912. 

 Athysanus bicolor DeL., Tenn. St. Bd. Ent., Bui. 17, p. 62, 1916. 

 Euscelis bicolor Van D., Cat. Hemip. X. A., p. 661, 1917. 

 Euscelis bicolor Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 71, 1919. 



Form: Very much like curtisii. Length, 3 to 3.5 mm. Vertex nar- 

 rower than in curtisii, about as wide as long, one-half longer on middle 

 than against eye, conical apically. Pronotum as long as the vertex, 

 lateral margins very short, humeral margins long, posterior margin 

 barely emarginate. Elytra rather short and broad, rounding apically, 

 venation simple. 



Color: Vertex yellow, with a pair of large black spots on anterior half 

 in the female which may be confluent and cover the entire anterior half 

 of the vertex as is the case in the male. Pronotum with anterior margin 

 black, the remainder bright yellow. Elytra greenish-yellow with humeral, 

 sutural and apical margins and claval suture fuscous or black, and some- 

 times with subhyaline and fuscous arcs extending obliquely backward 

 from the costal margins. Face black or fuscous above, pale below, a 

 fuscous lower band sometimes present in the male. 



External genitalia: Female, last ventral segment about as long as the 

 preceding, posterior margin angularly emarginate; pygofers moderately 

 robust, widest at the middle, much exceeded by the long ovipositor, very 

 sparsely spined. Male, valve very small, forming an equilateral triangle 

 one-third as wide as the last ventral segment; plates small, short, little 



12 — Sci. Bui. — 3058 



