150 



THE UNIVERSITY SCIENCE BULLETIN. 



Distributio7i: Fairly common in western portion of the state, 

 as shown by the following map : 



Hosts: Osborn and Ball give Sporobolns as the host. 

 Deltocephalus affiyiis G. & B. 



(PI. 12, figs. 5-6.) 



DeltocephaluH affinis G. & B., Hemip. Colo., p. 84, 1895. 



Deltocephalus melsheimerii Van D., Psyche, v, p. 390, 1890. 



Deltocephalus debilis Osb., la'. Agr. Col. Exp. Sta., Bui. 13, p. 100, 1891. 



Deltocephalus debilis Osb., U. S. Dept. Agr., Div. Ent., Bui. 30, p. 45, 1893. 



Deltocpphahis melsheimerii O. & B., Proc. la. Acad. Sci., iv, p. 211. pi. 24, fig. 1, 1897. 



Delfocephahis affinis Bak., Psyche, viii, p. 118, 1897. 



Deltocephalus affiiiis Osb., 20th Kept. N. Y. St. Ent., p. 522, 1905. 



Deltocephalus afiniJi Osb., U. S. Dept. Agr., Div. Ent., Bui. 108, p. 82, fig. 18. 1912 



Deltocephalus affinis Osb., Me. Agr. Exp. Sta., Bui. 238, p. 122, 1915. 



Deltocephalus affinis Van D., Cat. Heinip. N. A., p. 648, 1917. 



Deltocephalus affinis Kent., Ohio ,T1. Sci., .wiii, No. 6, 184, 1918. 



Form: Length, 3 to 4 mm. Vertex wider than long, obtusely pointed. 

 Pronotum a little longer than the vertex, lateral margins short, humeral 

 margins distinctly angled with the slightly emarginate posterior margin. 

 Elytra long, barely exceeding the abdomen sometimes, and again greatly 

 exceeding it. 



Color: Pale ashy-green, usually marked with fuscous. Vertex and 

 pronotum often unicolorous or mottled with fuscous, the latter sometimes 

 showing five pale longitudinal stripes. Elytra often unicolorously green- 

 ish-brown, sometimes with nervures heavily bordered with fuscous. Face 

 fuscous with light median line and arcs. 



External genitalia: Female, last ventral segment long, slightly nar- 

 rowed posteriorly, posterior margin broadly and angularly emarginate; 

 pygofers spiny on distal half, broad, equalling ovipositor. Male, last 

 ventral segment as long as preceding, valve very characteristic, large and 

 inflated, concealing all but the obtuse and divergent apices of the short 

 plates; pygofers very short, each with a tuft of long bristles. 



