LAWSON: KANSAS CICADID^. 345 



3. The clicking note "consisting of from 15 to 30 short, 

 quick sounds, sometimes double, the whole lasting about five 

 seconds." 



Tibicina septendecim var. cassinii (Fish.)- 



Cicada cassinii Fish., Proc. Acad. Nat. Sci. Phila., v, p. 272, 1851. 



Cicada septendecim var. cassinii RiJ., 1st Mo. Rept., p. 2-1, 1868. 



Cicada septendecim var. cassinii Van D., Cat. Hemip. N. A., p. 501, 1917. 



This variety occurs along with typical septendecim. It dif- 

 fers from the latter in being distinctly smaller and in usually 

 having the under side of the abdomen entirely black. Riley 

 states that the genital hooks of the male (uncus) vary con- 

 siderably in this variety whereas they are constant in typical 

 septendecim. At any rate they are often just like those of the 

 latter. 



Genus Okanagana Dist. 



This is a very large genus the members of which are most 

 abundant in the western states. As in Tibicina the cells of the 

 median area of the fore wings are distinctly longer than the 

 marginal cells. The head is clearly narrower than the base of 

 the mesonotum. The opercula are widely separated. The 

 transverse suture of the fore wings is not as distinct as in the 

 following genus. 



Only two species belonging to this genus are known to occur 

 in Kansas. They may be separated by the following key : 



KEY TO SPECIES. 



A. Species smaller, less than 20 mm.; black and hcney-yellow in color. 



synodica. 



AA. Species larger, over 20 mm.; black marked with reddish or orange. 



bella. 



Okanagana syyiodica (Say). 



(PI. xxii, figs. 5-6; pi. xxv, fig. 11; pi. xxvi, fig. 19; pi. xxvii. fig. 15.) 

 Cicada synodica Say, Jl. Acad. Nat. Sci. Phila., iv, p. 334, 1825; Conipl. Writ., ii, 

 p. 253. 



Cicada siinodica Uhl., Bui. U. S. Geol. Geog. Surv., i, p. 341, 1876: iii. p. 455, 1877. 

 Tihicen synodica Woodw., Psyche, v, p. 68, 1888. 

 Tihicen synodica Macg., Can. Ent., xxxiii, p. 78, 1901. 

 Okaiiayana synodica Dist., Cat. Honiop., Cicadidas, p. 126, 1906. 

 Okanagana synodica Van D., Jl. N. Y. Ent. Soc, xxiii. pp. 27, 40, 1915. 

 Okanagana synodica Van D., Cat. Hemip. N. A., p. 503, 1917. 



A small black and honey-yellow species. Specimens at hand measure 

 from 15 to 18.5 mm. 



Color: Head mostly black, with a transverse line across antennal 

 ledges and base of front, three triangular spots on posterior margin and 

 median line on front, honey-yellow. Pronotum with entire margin honey- 



