LAWSON: KANSAS CICADELLID^. 247 



quite forming- a stalk with the first apical vein. In Eryth- 

 roneura, on the other hand, the second vein clearly reaches the 

 posterior margin of the elytra and does not form a stalk with 

 the first apical vein. It agrees with the latter genus in having 

 the second apical cell oblong instead of stalked as in Typhlo- 

 cyba. 



Hymetta trifasciata (Say). 



(PI. 16, figs. 11-12.) 

 Tettigonia trifasciata Say, Jl. Acad. Nat. Sci. Phila., iv, p. 343; Comijl. Writ., ii, p. 

 259. 



TyjMocijha trifasciata Woodw., Psyche, v, p. 213, 1889. 

 Typhlocyba trifasciata Gill., Proc. U. S. Natl. Mus., xx, p. 755, 1898. 

 Typhlocyha trifasciata Osb., 20th Kept. N. Y. St. Ent., p. 544, 1905. 

 Typhlucyba trifasciata DeL., Tenii. St. Bd. Ent., Bui. 17, p. 106, 1916. 

 Erythroneura trifasciata Van D., Cat. Heniip. N. A., p. 712, 1917. 

 Hymetta trifasciata McAt., Proc. Biol. Soc. Wash., xxxii, p. 121, 1919. 

 Erythroneura trifasciata Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 113, 1919. 



Form: Rather robust, widest at the middle. Length, about 3 mm. 

 Head narrower than pronotum; vertex strongly produced, nearly twice 

 as long at middle as next the eye, about one-half wider than long. 

 Pronotum long, less than twice as wide as long, widest at lateral angles, 

 anterior margin strongly convex, lateral margins widening posteriorly, 

 posterior margin slightly concave. Elytra rather short and broad, 

 nearly truncate apically. 



Color: Vertex, pronotum, and scutellum creamy-yellow, elytra milky- 

 white. Vertex and pronotum often unmarked, former sometimes with 

 a pair of apical dashes and a pair of small circles on disc, red, besides 

 other red marks. Pronotum sometimes with reddish marks back of 

 the eyes and a red median line. Scutellum with tip always black. 

 Elytra more or less irrorate with red, with a broad brownish to reddish 

 transverse band just back of apex of scutellum, a faint smoky band, 

 bounded posteriorly near the costa by a red line, and another faint 

 band near the tip. Face pale, unmarked, or with a few reddish lines. 



External genitalia: Female, last ventral segment about two-thirds as 

 wide as preceding segment, triangular, about three-fourths as long as 

 wide, the margins concavely tapering on the posterior two-thirds to the 

 blunt apex ; pygofers rather stout, spiny along ovipositor, exceeded by the 

 latter. Male, valve broad but short, posterior margin truncate; plates 

 broad basally, suddenly narrowed just before the middle, then tapering 

 to acute upturned tips which exceed the short pygofers, margins with 

 three or four spines at point where plates are narrowed. 



Interval male genitalia: Styles with long anterior process, widening 

 after union with connective, then narrowing again before their widest 

 portion just cephalad of the preapical lateral incision which is very deep 

 and U-shaped, the outer angle before the incision very prominent, the 

 terminal process quite narrow basally but widening apically into two 

 lateral teeth, the outer being longer and more pointed than the mesal 

 one, the apex distinctly concave; connective stout, U-shaped; oedagus with 



