LAWSON: KANSAS CICADELLID^E. 89 



narrow, equalling ovipositor. Male, plates broad at base, very acute 

 apically; pygofers long, narrow, scarcely tapering, much exceeding plates. 



Hosts: According to De Long this species was taken on 

 weeds and shrubs. 



Genus Kolla Dist. 



Distant describes this genus as follows: "Allied to Tetti- 

 goniella, but differing by the structure of vertex of the head, 

 which is subconically narrowed anteriorly, with the lateral 

 margins in a line with the outer margins of the eye ; near the 

 inner margin of the eyes the vertex is also more or less f oveate ; 

 face with the lateral areas somewhat strongly, transversely 

 striate, and centrally, longitudinally sinuate and flattened." 



Three species of this genus have been collected in Kansas. 



KEY TO SPECIES. 



A. Conspicuously marked with bands and stripes. 



B. Elytra striped; over 5.5 mm. in length. bifida. 



BB. Elytra not striped; 5 mm or less in length. geometrica. 

 AA. Not marked with bands and stripes, rather uniformly brownish or 

 black. hartii. 



Kolla bifida (Say). 



(PI. 7, figs. 4-5. ■> 

 Ten\gonia bifida Say. .71. Acad. Nat. Sci. Phila., vi, p. 313, 1831; Compl. Writ., ii. 

 p. 387. 



Tettigonia bifida Fh., Homop. N. Y. St. Cab., p. 55, 1851. 



Tettigonia tcnella Walk., List Homop., iii, p. 770, 1851. 



Tettigonia bifida Sign., Ann. Soc. Ent. Fr., ser. 3, ii, p. 11, pi, 1, fig. 11, 1854. 



Helochora bifida Prov., Pet. Faune Ent. Can., iii, p. 338, 1890. 



Tettigonia bifida Van D., Bui. Buf. Soc. Nat. Sci., v. p. 196, 1894. 



Tettigonia bifida O. & B., Proc. la. Acad. Sci., iv, p. 175, 1897. 



Tettigonia bifida Ball. Proc. la. Acad. Sci., viii, p. 58, pi. 5, fig. 1, 1901. 



Tettigonia bifida Osb., 20th Kept. N. Y. St. Ent., p. 509, 1905. 



Tettigonia bifida Osb., U. S. Dept. Agr. Bur. Ent., Bui. 108, p. 63, 1912. 



Tettigonia bifida Osb., Me. Agr. Exp. Sta., Bui. 238, p. 99, 1915. 



EoUa bifida DeL., Tenn. St. Bd. Ent., Bui. 17, p. 22, 1916. 



Kolla bifida Van D., Cat. Hemip., N. A., p. 598, 1917. 



Kolla bifida Ols., Bui. Am. Mus. Nat. Hist., xxxviii, p. 5, 1918. 



Cicadella bifida Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 31. 1919. 



Form: A fairly large, robust species. Length, 5.5 to 6 mm. Vertex 

 about twice as wide as long, bluntly conical. Pronotum slightly wider 

 than head, and nearly twice as long, anterior margin broadly convex, 

 posterior margin very slightly concave, lateral and humeral margins about 

 equal. Elytra broad, venation very simple, there being no cross nervures 

 before the apical cells. 



Color: Vertex black with two white spots at apex and a median and 

 basal band yellowish or white. Face very dark brown, lighter laterally. 

 Pronotum greenish with anterior margin black, followed by a yellow band, 

 posterior margin white or greenish-white, preceded by a black band. 



