136 



THE UNIVERSITY SCIENCE BULLETIN. 



External genitalia : Female, last venti-al segment broad, slightly 

 keeled, posterior margin rounding and with a slight median notch; 

 sparsely spined pygofers broad and slightly exceeded by the ovipositor. 

 Male, last ventral segment distinctly and roundingly emarglnate; valve 

 laige, slightly wider than long, rounded posteriorly; plates, spiny-mar- 

 gined, broad at base, subacute apically, about as long medially as the 

 valve, somewhat exceeded by the spiny pygofers. 



Internal male genitalia: Styles larger than in preceding species, 

 broad at base, then of nearly uniform diameter to terminal finger-like 

 process which is relatively long and slender; connective in the form of 

 an arc with a slight median swelling on the inside and two small proc- 

 esses on the convex surface, between which arise two very long, slender 

 and curving processes, which in the specimen dissected did not encircle 

 the oedagus as in the two preceding species; oedagus much as in cinereus, 

 but apically broadened rather than tapering and with distinct apical 

 teeth dorsally. 



Distribution: Our most abundant member of this genus, 

 though seemingly largely confined to the eastern portion of the 

 state, as shown by the following map : 



Hosts: Taken commonly on grasses and weeds. 

 Platymetopius scriptiis Ball. 



Platymftopiiis sri-i/jtun Ball, Enf, News, xx, p. 165, 1909. 

 I'lalymetophtK ncriptus Van D., Ann. Ent. Soc. .\m., iii, p. 228, 1910. 

 Platymetopius scriptus DeL., Tenn. St. Bd. Ent., Bui. 17, p. 42, 191C. 

 Platymetopius scriptvs Van D., Cfit. Hemip. N. A., p. 038, 1917. 



Form: Much like frontalis. Length, 3.5 to 4 mm. Vertex slightly 

 longer than basal width, disc slightly convex but with distinct median 

 longitudinal depression. Pronotum over twice as wide as long, anterior 

 margin quite convex, posterior slightly concave, humeral margins nearly 

 twice the length of the lateral. Elytra broad and rather short. 



