134 



THE UNIVERSITY SCIENCE BULLETIN. 



Distribution: Occurs throughout the state, though more 

 abundant in northern part as shown by the following map: 



Hosts: Taken usually on grasses on which it seems to be a 

 general feeder. 



Platymetopius cinereus O. & B. 



(PI. II, figs. 3-4.) 

 Platymetopius cinereus O. & B., Proc. la. Acad. Sci., iv, p. 193, pi. 26, fig. 1, 1897. 

 Platymetopius cinereus Van D., Ann. Ent. Soc. Am., iii, p. 223, 1910. 

 Platymetopius cinereus Osb., U. S. Dept. Agr., Div. Ent., Bui. 108, p. 72, 1912. 

 Platymetopius cinerejis DeL., Tenn. St. Bd. Ent., Bui. 17, p. 39, 1916. 

 Platymetopiiis cinereus Van D., Cat. Hemip. N. A., p. 637, 1917. 

 Platymetopius cinereus Lathi-., S. C. Agr. Exp. Sta., Bui. 199, p. .56, 1919. 



Form: Smallest member of genus in Kansas. Length, 3.5 to 4 mm. 

 Vertex of female three-fifths as wide as long, in male nearly as wide as 

 long. Pronotum characteristic of the genus, lateral margins short. Scu- 

 tellum large. Elytra long and broad. 



Color: Cinereous; vertex yellowish, irrorate with broMn, with light 

 lines on disc and median line on apical third. Pronotum of same color 

 with five faint longitudinal lines. Scutellum yellowish, with basal and 

 apical angles darker. Elytra light or hyaline with brown irrorations 

 and with whitish hyaline spots, costal and apical veins black, especially 

 in the male. 



External genitalia: Female, last ventral segment long, narrowed pos- 

 teriorly, posterior margin medially produced and with a slight median 

 notch; pygofers long, widest at the middle, slightly exceeded by ovi- 

 positor. Male, posterior margin of last ventral segment obtusely and 

 angularly incised; valve large, obtusely rounded at apex, over half the 

 length of the spiny-margined and obtusely pointed plates; pygofers spiny, 

 acute at apex, slightly exceeding plates. 



Internal male genitalia: Styles much as in acntus, but differing in 

 small details, especially the relatively longer terminal finger and the 

 angle it makes with the rest of the style; connective in the shape of a 



