246 IOWA ACADEMY OF SCIENCES. 



Vertex one-third longer on middle than next eye, very obtusely and 

 rounding-ly angulate, the margin rounded; front narrowing rapidly from 

 antennae to clypeus; clypeus nearly twice as long as broad, scarcely widening 

 at apex; lorse small, oval; genae broad, distinctly angular. Pronotum 

 strongly curved anteriorly, posterior border straight, lateral margins very 

 short. Elytra long and narrow, nervures distinct. 



Color: Vertex, pronotum and scutellum light yellow with faint ochrac- 

 eous stripes, the two median ones extending to margin of vertex and 

 diverging posteriorly to cover the lateral angles of the scutellum, the outer 

 ones on pronotum only. Across the front of the vertex a row of six dots, 

 the inner ones behind the margin the outer ones directly on the margin in 

 front of the eyes, all black or the inner ones faint or obsolete, but those 

 next the eyes are black in all but one of the specimens in hand. The elytra 

 are flavescent or faintly cuprescent with the nervures conspicuously whitish. 

 Beneath, entirely pallid, except the median posterior part of the ultimate 

 ventral segment in female, bordering the notch laterally, and exposed 

 edges of ovipositor, light fuscous. Venter and margins of dorsum in male 

 sometimes more decidedly yellow. 



Genitalia: Female, ultimate ventral segment short, the posterior mar- 

 gin produced each side of a median broad and deep notch, the median por- 

 tion of which is straight or scarcely produced into a very obtuse tooth 

 pygofers set with stiff hairs on the posterior portion; male, valve, anterior 

 margin convex, posterior margin straight; plates triangular, outer margin 

 slightly convex and sparsely ciliated; points acute; pygofers exceeding the 

 plates, obliquely sinuate, acute at tip and bearing rather strong hairs. 



Described from eight females and four males collected at 

 Ames, Iowa, by Mr. E. D. Ball. ^ 



This species is quite similar to fitcM in size but is more yel- 

 low in color and the genitalia are quite distinct. 



CHLOROTETTIX BALLI N. SP. 



Resembling unicolor ana spatulatua but more yellowish-green and with 

 the vertex subangulate. Ultimate ventral segment female withaspatulate 

 process. 



Length to tip of elytra, female, 7-7.25 mm., male, 7 mm. 



Vertex one-half longer on the middle than next the eyes, subangulate; 

 front narrowing in almost straight lines to the clypeus; clypeus broader and 

 shorter than in ^spatulatus, base and tip slightly convex, sides parallel. 

 Pronotum strongly emarginate behind. Elytra entirely hyaline, the veins 

 indistinct. 



Color yellowish-green. Head and thorax usually darker green, the tip 

 of vertex, margin of venter, and dorsum of abdomen in most specimens 

 suffused with ochreous. 



Genitalia: Female, ultimate ventral segment long and with a deep 



notch extending to near the base and including a spatulate process as in 



Vspatulatus. The notch is deeper and wider and more open at the base of 



the spatulate process, the process is broader and reaches only half way to 



the tips of the subacute lateralmarginsof the segment; male, valve large. 



