LAWSON: KANSAS CICADELLID^. 



243 



Form: Length, about 3.5 mm. Vertex one-third longer on middle 

 than next the eye, distinctly produced, less than twice as wide as long. 

 Pronotum twice as wide as long, anterior margin strongly convex, lateral 

 and humeral margins about equal, posterior margin distinctly emarginate. 

 Elytra long and narrow. 



Color: Yellowish-green. Vertex with median line, dashes on either 

 side anteriorly and posteriorly, white. Pronotum with six, sometimes 

 with eight, white spots along anterior margin. Scutellum with a white 

 *'H" on anterior portion, and three white lines on posterior half. Elytra 

 greenish, sometimes smoky. Face yellowish above, greenish below, with 

 white median line and other white markings between it and the eyes. 



External genitalia: Female, last ventral segment long, posterior mar- 

 gin slightly produced or truncate; pygofers rather robust, spiny mesally, 

 exceeded by the ovipositor. Male, last ventral segment very large, pos- 

 terior margin rounding; plates long and narrow, apices obtuse, upturned, 

 and laterally compressed, thickly covered with white hairs and spines; 

 pygofers very short, completely covered by the plates. 



Internal male genitalia: Styles long and slender, sinuate; connective 

 the form of an equilateral triangle with the corners rounded and the 

 sides slightly concave; cedagus long and slender, very slender basally, 

 then widening and again narrowing to tip when viewed laterally. Viewed 

 dorsally it is enlarged apically into a blunt spearhead. 



Distyihution: This is by far the commonest member of this 

 genus. Its recorded distribution for the state is shown by 

 the following map : 



Hosts: Taken on a large variety of hosts and very abun- 

 dantly at lights. Because of feeding on so many cultivated 

 plants it is of decided economic importance. It is common on 

 many members of the family Legumiiiossn, especially on alfalfa 

 and beans. It is often an apple pest. In the last year it has 

 been attracting much attention due to its work on potatoes. 

 Doctor Ball has shown that it is the means of producing "hop- 



