LAWSON: KANSAS CICADELLID^E. 165 



Color: When alive this species is bluish-green and silvered. The dead 

 specimens are yellowish, unmarked, or with the dark colors of the body 

 showing through the pronotum and elytra, and each abdominal segment 

 with a transverse row of dots on anterior portion. 



External genitalia: Female, last ventral segment short, broadly and 

 deeply emarginated medially and sometimes with a small tooth in the 

 middle of the emargination ; pygofers long and narrow but greatly ex- 

 ceeded by the very long ovipositor. Male, valve large, triangular, apex 

 obtuse; plates large, diverging, outer margin sinuate, inner margin 

 broadly rounding to meet outer margin in a subacute apex; pygofers 

 drawn out into long black chitinous points which run down between the 

 plates. 



Distribution: Ottawa, Greeley and Lane counties. 



Hosts: Taken in very large numbers with the preceding 

 species in pastures where buffalo grass and Bouteloua are the 

 chief grasses. 



Genus DRIOTURA 0. & B. 



The members of this genus are very robust forms with short 

 heads, vertex twice as wide as long, and parallel-margined. 

 Face broad and short, twice as wide above as at parallel-mar- 

 gined clypeus. The pronotum is very short, a little longer than 

 the vertex, transversely striated on posterior two-thirds. 

 Elytra rarely long, reaching to ovipositor, usually short, cori- 

 aceous and coarsely rugose, barely covering second abdominal 

 segment. Abdomen short in male, much inflated in female. 



Two species and a variety of this genus have been taken in 

 Kansas. 



KEY TO SPECIES. 



A. Color black or brownish, usually unicolorous. gammaroidea. 

 A A. Color gray, vertex and pronotum marked with white, robusta. 



Driotura gammaroidea (Van D.) . 



Athysanus gammaroidea Van D., Bui. Buf. Soc. Nat. Sci., v, p. 209, 1894. 

 Driotura gammaroidea O. & B., Proc. Dav. Acad. Sci., vii, p. 89, pi. 4, fig. 3, 1898. 

 Driotura gammaroidea Osb., 20th Kept. N. Y. St. Ent., p. 529, 1905. 

 Anoterostemma gammaroidea Horv., Ann. Mus. Natl. Hung., vi, p. 568, 1908. 

 Driotura gammaroidea Osb., Me. Agr. Exp. Sta., Bui. 238, p. 132, 1915. 

 Driotura gammaroidea DeL., Tenn. St. Bd. Ent., Bui. 17, p. 64, 1916. 

 Driotura gammaroidea Van D., Cat. Hemip. N. A., p. 654, 1917. 

 Driotura gammaroidea Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 74, 1919. 



Form: Short and robust. Length, 3 to 4 mm. Vertex twice as wide 

 as long, front margin more convex than posterior, broadly rounding with 

 front. Pronotum very short, over three times as wide as long, lateral 

 margins distinct, in brachypterous forms humeral margins seemingly a 

 part of the slightly emarginate posterior margin, more distinct in 

 macropterous forms. Scutellum small. Elytra rarely long, reaching the 



