LAWSON: KANSAS CICADELLIDvE. 55 



Genus Agalliopsis Kirk. 



This genus is distinguished from related genera by the 

 characteristic elevated and irregularly curved posterior margin 

 of the vertex. This condition results from a similarly formed 

 vertex in the nymphs, in which, according to Osborn and Ball, 

 "the entire posterior margin of the vertex is elevated and car- 

 ried obliquely upward and forward before the eyes on the same 

 plane as the face, the upper carinate margin being shallowly 

 roundingly bilobed." 



Only two species of this genus are found in the United States, 

 one of which occurs in Kansas. 



Agalliopsis novella (Say). 



(PI. 2, figs. 1-4.) 



Jassus novellus Say, Jl. Acad. Nat. Sci. PhiLa., VI, p. 309, 183J. 



Macropsis nobilis Forbes, 14th Kept. 111. St. Ent., p. 22, 1884. 



Agallia novellus Van D., Can. Ent., XXI, p. 8, 1889. 



Idiocerus novellus Pror., Pet. Faune Ent. Can., Ill, p. 293, 1890. 



Agallia novella Van D., Bui. Buf. Soc. Nat. Sci., V, p. 196, 1894. 



Agallia novella O. & B., Proc. Dav. Acad. Nat. Sci., VII, p. 54, 1898. 



Agallia novella DeL., Tenn. St. Bd. Ent., Bui. 17, p. 13, 1916. 



Agallia novella Van D., Cat. Heraip. N. A., p. 571, 1917. 



AgaUia novella Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 20, 1919. 



Form: The body outline forms almost a perfect wedge. It is com- 

 paratively more slender than the members of the genus Agallia. Length, 

 about 3.75 mm. Vertex short, gradually lengthening toward eyes, with 

 distinct lobe caudad of mesal margin of eyes. Pronotum twice as wide 

 as long, anterior margin quite convex between lobes of vertex, posterior 

 margin slightly concave within same limits, lateral margins obsolete, 

 humeral margins long, longer than in Agallia constricta. Elytrjt very 

 long, extending far beyond tip of abdomen. 



Color: There is a considerable range of variation in the color. Some 

 specimens, especially females, are often almost unicolorously light brown, 

 barely showing the four black spots near the margin of the vertex. 

 Others, usually males, have a much more variegated appearance, being 

 dark brown, with lighter markings along the margin of the vertex, sides 

 of the scutellum, the basal half and tip of the clavus. In such forms 

 the four black spots of the vertex are very prominent, as is the median 

 line of the pronotum with its dark black spot on either side. 



External genitalia: Female, last ventral segment very long laterally 

 but only about half as long medially, due to a deep circular excision ;- 

 pygofers exceeded by the ovipositor. Male, valve about two-thirds as 

 long as wide, truncate behind; plates long and scarcely tapering except 

 near tip and forming the lid to a box formed by the very peculiar and 

 very characteristic pygofers. The last-mentioned organs alone are 

 enough to distinguish the males of this species. 



