LAWSON: KANSAS CICADELLID^E. 189 



gins short, broadly rounding with humeral margins. Elytra rather short 

 with the two cross nervures characteristic of the group. 



Color: Whitish, sometimes tinged with green or brown. Vertex un- 

 marked or usually with thin interrupted marginal line and a pair of 

 basal spots, brown or black. Pronotum usually unmarked or with disc 

 irrorate with brown and a few dark spots behind the eyes. Elytra milky- 

 white with nervures brown, sparsely reticulated with brown. Face pale, 

 unmarked, or with dark bands darkening above. 



External genitalia: Female, last ventral segment twice as long as 

 the preceding, narrowed strongly on posterior half, posterior margin 

 broadly and deeply emarginate, with a median lobe which has brown 

 margins and is very slightly notched apically; pygofers broad, exceeded 

 by ovipositor, sparsely spined on distal half. Male, valve small, rounded 

 posteriorly; plates about equal in length to their combined basal width, 

 margins spiny, acute apices exceeding pygofers. 



Distribution: Taken in Ottawa county only. 

 Hosts: Doctor Ball gives Artemesia dracunculoides as the 

 host plant of this species. 



Mesamia vitellina (Fh.). 



Acocephalus ritfllinv.s Fh., Homop. N. Y. St. Cab., p. 57, 1851. 



Jassus twiningi Uhl., Bui. U. S. Geol. Geog. Surv., iv, p. 511, 1878. 



Xetenocephalus vitellinus Van D., Psyche, v, p. 390, 1890. 



Paremesua furcatus Osb., Can. Ent., xxxii, p. 285, 1900. 



Paramesus vitellina Osb., 20th Kept. N. Y. St. Ent., p. 516, 1905. 



Eutettix (Mesamia,) vitellina Ball, Proc. Dav. Acad. Sci., xii, p. 67, pi. 4, fig. 2, 1907. 



Eutettix vitellina Osb., Me. Agr. Exp. Sta., Bui. 238, p. 139, 1915. 



Mesamia vitellina Van D., Cat. Hemip. N. A., p. 628, 1917. 



Form: Our largest member of the genus. Length, 5.5 to 6.5 mm. Ver- 

 tex long, almost as long as the pronotum, one-half longer on the middle 

 than next the eye, less than twice as broad as long in the female, very 

 slightly depressed, margin acute. Pronotum over twice as broad as long, 

 lateral margins not greatly shorter than the humeral, posterior margin 

 emarginate. Elytra long, venation indistinct, but with the two cross 

 nervures between the sectors and several costal veinlets. 



Color: Fulvous-yellow. Vertex yellow, unmarked. Pronotum fulvous 

 with anterior margin yellow, with a fairly distinct median line and lateral 

 ones, light. Scutellum pale, basal angles fulvous. Elytra golden or 

 fulvous-yellow with darker oblique basal band and a parallel band ending 

 on tip of clavus, darker, whole surface with white spots. Face yellow. 



External genitalia: Female, last ventral segment nearly twice as long 

 as preceding, narrowed posteriorly to broadly rounding lateral lobes, be- 

 tween which the posterior margin is emarginate with a strap-like median 

 lobe; pygofers broad, exceeded by ovipositor, sparsely spined. Male, 

 valve triangular, two-thirds as long as last ventral segment, obtuse 

 apically; plates nearly four times the length of the valve, apices atten- 

 uate, acute, exceeding pygofers, margins spined. 



