LAWSON: KANSAS CICADELLID^E. 169 



Euscelis exitiosus (Uhl.). 



(PI. 12, figs. 9-10.) 



Cicadula exitiosa Uhl., Am. Ent., iii, p. 72, 1880. 

 Limotettix exitiosa Van D., Psyche, v, p. 306, 1892. 

 Eutettix exitiosus O. & B., Hemip. Colo., p. 100, 1895. 

 Athysanus exitiosus O. & B., Ohio Nat., ii, p. 234, pi. 16, fig. 2, 1902. 

 Athysanus exitiosus Osb., U. S. Dept. Agr., Div. Ent., Bui. 108, p. 86, fig. 21, 1912. 

 Athysanus exitiosa Will., Kans. Univ. Sci. Bui., viii, p. 226, 1913. 

 Phrynomorphus exitiosus Barb., Bui. Am. Mus. Na-t. Hist., xxxiii, p. 534, 1914. 

 Athysanus exitiosus DeL., Tenn. St. Bd. Ent., Bui. 17, p. 60, 1916. 

 Euscelis exitiosus Van D., Cat. Hemip. N. A., p. 655, 1917. 

 Euscelis exitiosus Fent., Ohio Jl. Sci., xviii, No. 6, p. 185, 1918. 

 Euscelis exitiosus Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 70, 1919. 



Form: Varying greatly in size. Length, 3.5 to 5.5 mm. Vertex one- 

 third longer on middle than next the eye, over twice as broad as long, 

 broadly rounding with front, obtusely angled at apex. Pronotum one- 

 third longer than vertex, lateral margins short, posterior margin dis- 

 tinctly emarginate. Elytra greatly exceeding the abdomen, somewhat 

 flaring apically, appendix large, extending entirely around the end of the 

 wing. 



Color: Varying greatly from quite light to dark forms. Vertex pale, 

 with orange-yellow tinge, especially apically, with two black spots on 

 margin, two black spots, usually fused into a line across the basal angle, 

 and a brown crescent between the eyes, parallel to the anterior margin. 

 Pronotum light brown with four black spots behind anterior margin, disc 

 darker. Scutellum yellowish with black basal angles and a brown divided 

 median line. Elytra milky, hyaline, nervures brown and distinct. Face 

 light, marked with brown arcs. 



External genitalia : Female, last ventral segment twice as long as 

 preceding, posterior margin truncate or slightly emarginate; pygofers 

 rather long and narrow, greatly exceeded by the ovipositor, sparsely 

 spined. Male, valve small and triangular, apex obtuse; plates narrow 

 and long, three times as long as the valve, divergent, submarginally spiny, 

 exceeding the pygofers. 



Internal male genitalia : Styles with long anterior process and stout 

 process to connective, then narrowing rapidly to about the middle, the 

 margins then about parallel up to the much bent terminal hook; con- 

 nective slender, Y-shaped, the arms slightly longer than the stem which 

 widens distally; oedagus with basal portion broad and triangular when 

 viewed dorsally, terminal process heavy, widest at middle, ending in a 

 blunt hook. 



