LAWSON: KANSAS CICADELLID^. 69 



External genitalia: Female, last ventral segment about one-fourth as 

 long as wide laterally, but nearly one-half as long as wide medially, due 

 to large rounded median lobe on posterior margin; pygofers exceeded by 

 ovipositor for about one-third their length. Male, last ventral segment 

 narrow, the tip of triangle, in the wide median incision, reaching pos- 

 teriorly to point in line with lateral lobes; plates very long and narrow, 

 frequently greatly exceeding the short pygofers. 



Internal male genitalia: Styles large with basal portion much larger 

 proportionally than in verticis; connective of same type as in verticis but 

 with dorsal portion wider, though not as wide as in snowi, and with end 

 fastened to cedagus much more deeply emarginated than in the latter; 

 oedagus without basal portion as in verticis, dorsal arm very heavy and 

 with heavy ventral portion provided with retrorse lateral processes 

 which, however, are nearer the apex than in snowi, giving the arrowhead 

 appearance; antennae with moderately large oblong discs. 



Distribution: Taken in Harvey, Harper, Riley, Pottawato- 

 mie, and Wyandotte counties. 



Hosts: Willows. Doctor Osborn gives poplar as a host, too. 

 Crevecreur records sweeping specimens from weeds in a 

 pasture. 



Idiocerus duzeei Prov. 



erus duzeei Prov., Pet. Faune Ent. Can., iii, p. 292, 1890. 

 erus perplexus G. & B., Hemip. Colo., p. 78, 1895. 

 erus perplexus Bak., Ent. News, viii, p. 54, 1897. 



Idio 

 Idio 



erus duzeei O. & B., Proc. Dav. Acad. Sci., vii, p. 136, 

 erus duzeei Bak., Can. Ent.. xxxii, p. 207, 1900. 



Idiocerus perplexus Tuck, Univ. Kan. Sci. Bui., iv, p. 65, 1907. 

 Idiocerus perplexus Osb., Me. Agr. Exp. Sta., Bui. 238, p. 95, 1915. 

 Idiocerus perplexus Van D., Cat. H'emip. N. A., p. 577, 1917. 



Form: Slightly larger than pallidus. Elytra longer, broad, rarely 

 having outer anteapical cell. Length, 6 to 7 mm. 



Color: Yellowish-green, pronotum greenish, scutellum and elytra gol- 

 den-yellow, latter becoming smoky at tip in female and darker still in 

 male. 



External genitalia: Female, last ventral segment longer laterally than 

 in pallidus, and therefore having a less prominent lobe medially on the 

 posterior margin; pygofers broad and long, slightly exceeded by ovi- 

 positor. Male, last ventral segment much as in pallidus but with median 

 triangular lobe not quite as long; valves long and narrow, greatly ex- 

 ceeding the short pygofers; antennal disc more slender than in pallidus. 



Distribution: Taken only in Pottawatomie and Riley coun- 

 ties. 



Hosts: Osborn and Ball give cottonwood as the host of this 

 species. 



