LAWSON: KANSAS CICADELLID^. 78 



Macropsis tristis (Van D.). 



Pediopsis tristis Van D., Can. Ent., xxii, p. 249, 1890. 

 Pediopsis tristis Osb., Proc. la. Acad. Sci., i, pt. 2, p. 126, 1892. 

 Pediopsis tristis O. & B., Proc. Dav. Acad. Sci., vii, pp. 66, 115, 1898. 

 Pediopsis tristis Ball, Ohio Nat., iii, p. 398, 1903. 

 Macropsis tristis "Van D., Cat. Hemip. N. A., p. 585, 1917. 



This species very likely occurs in Kansas. It is a grayish-brown form 

 with face marked with a black band above and large spot below the 

 ocelli. Striations of pronotum very distinct. Scutellum with dark tri- 

 angular spots on basal angles. Elytra with light nervures, heavily 

 fuscous-margined, making them very distinct and characteristic. Length, 

 4.75 to 5.5 mm. 



Hosts: Dr. Ball gives wild plum as the host of this form. 

 Macropsis trimaculata (Fh.). 



Pediopsis trimaculatus Fh., Homop. N. Y. St. Cab., p. 60, 1851. 



Bythoscopus trimaculatus Walk., List Homop., iv, p. 1162, 1852. 



Pediopsis insignis Van D., Ent. Am., v, p. 171, 1889. 



Pediopsis insignis Osb., Proc. la. Acad. Sci., i, pt. 2, p. 126, 1892. 



Pediopsis trimaculata O. & B., Proc. Dav. Acad. Sci., vii, p. 116, 1898. 



Pediopsis trimaculata Ball, Ohio Nat., iii, p. 398, 1903. 



Pediopsis trimaculata Osb., 20th Kept. N. Y. St. Ent., p. 504, 1905. 



Pediopsis trimaculata Van D., Can. Ent., xli, p. 383, 1909. 



Pediopsis trimaculata Osb., Me. Agr. Exp. Sta., Bui. 238, p. 91, 1915. 



Macropsis trimaculata Van D., Cat. Hemip. N. A., p. 584, 1917. 



Form: Smaller than preceding species. Length, 4 to 4.5 mm. Vertex 

 and pronotum obtusely angled, latter distinctly striated and with pos- 

 terior margin broadly and rather deeply concave. 



Color: Yellowish-brown to dark brown, face unicolorous. Scutellum 

 with triangular dark spot in each basal angle. Elytra with three white 

 spots in a row on each elytron, the anterior one frequently wanting. Pro- 

 pleura with dark spot in both sexes. Differs from tristis in having face 

 unmarked. 



External genitalia : Female, last ventral segment about twice as broad 

 as long, lateral margins greatly narrowed posteriorly, reducing posterior 

 margin to less than one-half width of anterior margin, posterior margin 

 broadly incised between the distinct lateral angles; pygofers long and 

 narrow, exceeded by the ovipositor. Male, last ventral segment about 

 twice as broad as long, posterior margin slightly emarginate medially; 

 plates long and narrow, somewhat flattened, much exceeding the pygof- 

 ers; broad and short, widest near the tip and ending truncately. 



Distribution: Pottawatomie county is the only place in the 

 state where this species has yet been taken. 



Hosts: Occurs with the preceding form on wild plum. 



