LAWSON: KANSAS CICADID^. 335 



Remarks: Davis originally described this species as a va- 

 riety of T. marginalis, saying that he considered it as more of 

 a mountainous form than the typical marginalis. Its recorded 

 distribution in Kansas would seem to indicate the correctness 

 of his view as to its ecological distribution. 



Tihicen eugraphica (Davis). 



(PI. xxi. figs. 7-8; pi. xxv, fig. 2; pi. xxvi, fig. 7; pi. xxvii, fig. 2.) 

 Cicada euyraphica Davis, Jl. X. Y. Ent. Soc, xxiv, p. 52, pi. 5, fig. 3. 1916. 

 Tihicen eugraphica Van D., Cat. Hemip. N. A., p. 492, 1917. 



A small black species marked with yellowish-orange. The speci- 

 mens at hand measure from 18 to 24 mm., the average being about 22 mm. 



Color: Head black, marked with yellowish-orange as follows: An 

 elliptical spot on upper part of front, a spot on each side above antennae 

 and running along base of front, a spot on each side above the antennae 

 and between the latter and the eyes, and irregular spots laterad of 

 lateral ocelli and running along posterior margin. Pronotum yellowish- 

 orange, often with the two black median triangles entire though some- 

 times broken with orange, the grooves, humeral angles, and anterior 

 margin of collar also irregularly black. Mesonotum yellowish-orange, 

 marked with black as follows: Between the arms of the W, a pair of 

 large spots laterad of these and extending to the posterior margin, small 

 spots on the lateral margins, and caudad of the W a cross-shaped spot 

 which, however, is often reduced to just the standard, on either side of 

 which there are always two black dots. Abdominal terga usually black, 

 sometimes dark brown, the posterior margins yellowish-brown. Fore 

 wings with costal margins light to about the middle, beyond this, along 

 with the rest of the veins, dark brown. Cross veins between R, and 

 Ri-.-. and betweexi the latter and Mi are perfectly clear. The basal 

 areoles of the fore wings are also clear, while the flaps of both wings 

 are grayish. Beneath the insect is brownish, the opercula lighter, and 

 in fresh specimens the whole surface is pruinose. The legs are yellowish- 

 orange and streaked with testaceous. 



Form : The following are the measurements in millimeters of the 

 specimens at hand : 



Length of body 18 to 24 



Width of head 8 to 9.25 



Expanse of fore wings 62 to 69 



Greatest width of fore wings 9 to 10 



Greatest width of operculum 5 



Greatest length of operculum 6 



The opercula are distinctly wider than long excluding the extension 

 beyond the coxal cavity. The mesal margins nearly or just touch, the 

 lateral margins are sinuate, while the posterior margins are broadly 

 and evenly rounded. 



Gentalia : The supra-anal plate of the male has a broad rectangular 

 notch apically in which is just the suggestion of a median tooth. Viewed 

 laterally the lateral angles have a small but distinct anteriorly project- 



