LAWSON: KANSAS CICADELLID^. 255 



Form: Length, 2.75 to 3 mm. Vertex over one-half longer at middle 

 than next the eye, nearly one-half longer than wide. Pronotum twice 

 as wide as long, anterior margin strongly convex, lateral margins long 

 and gradually widening posteriorly, humeral margins indistinct, fusing 

 with slightly concave posterior margin. Elytra long and narrow. 



Color: Pale yellow. Vertex with two longitudinal red lines, often 

 meeting apically, thus forming an inverted V. Pronotum with two 

 lateral lines and a median Y-shaped line, red. Basal angles of scutellum 

 red. Elytra marked with red, clavus with red band along claval suture, 

 widened at base and extending to the elytral suture at about the middle 

 of the clavus, also a red spot at tip of clavus; corium with a long red 

 line, narrow basally, then suddenly widening and reaching to claval 

 suture and again reaching toward apical claval spot, finally ending in the 

 red transverse nervures, laterally reaching to costal black spot at about 

 the middle of costal margin, with a black spot on inner margin just 

 beyond tip of clavus and another, often lacking, in second apical cell, 

 the apical portion of the elytra often smoky. The abo\{e markings all 

 vary greatly in intensity, being light in the summer and becoming 

 brighter and darker in the fall and winter. 



External genitalia: Female, last ventral segment large, triangular, 

 posterior margin strongly produced medially, slightly concave on either 

 side of the obtuse apex; pygofers moderately robust, with a row of 

 spines on either side of the usually black-tipped ovipositor which slightly 

 exceeds the pygofers. Male, valve large, broad, posterior marg-in trun- 

 cate or slightly concave; plates wide basally, suddenly narrowed and 

 spiny at basal third, then gradually narrowed to upturned and usually 

 black tips which slightly exceed the pygofers. The latter bear a U- 

 shaped chitinous process on the dorsal margin near the apex, of which 

 the lower tooth is the larger. 



Internal male genitalia: Styles long, with long. anterior portion nearly 

 parallel-margined, a lateral constriction opposite swollen place of attach- 

 ment to connective, then widening laterally to widest point, again nar- 

 rowing and then slightly widened just before lateral preapical incision, 

 tips turned outward, ending in two acute points, the outer the larger, 

 between which the end is slightly concave, and with a large tooth on the 

 mesal margin a short distance back of the apex; connective V-shaped, 

 stout, the apex with a distinct dorsally directed portion ; oedagus sending 

 up an anterior process a short distance from the base, which expands 

 dorsally and shows, when viewed dorsally, an anterior tooth and two 

 pairs of lateral processes, the anterior ones more slender and more acute 

 than the shorter but much stouter posterior pair, the apex quite obtuse. 

 Then the main or posterior part curves dorsad and divides into two slen- 

 der and acute processes, the tips of which are seen one on either side of 

 the bifid apex of the anterior process. 



