100 THE UNIVERSITY SCIENCE BULLETIN. 



Trttigoni* didvcta Fowl., Biol. Centr. Am., Homop., ii, p. 274, pi. 18, fig. 17, 1900. 

 l>r,r,-i,lacephala reticvlata Ball, Proc. la. Acad. Sci., viii. p. 73, pi. 6, fig. 8, 1901. 

 Drcecvlacephala reticvlata Osb., Ohio Nat., ix, p. 463, 1909. 



Drtrcvlactphala, reticvlata Osb., U. S. Dept. Agr., Div. Ent., Bui. 108, p. 52, 1912. 

 Drcecvlacephala reticvlata Van D., Ent. News, xxiv, p. 179, 1915. 

 Dnrciilacephala reticvlata DeL., Tenn. St. Bd. Ent., Bui. 17, p. 27, 1916. 

 Drcecvlacephala reticvlata Van D., Cat. Hemip. N. A., p. 606, 1917. 

 Drcecvlacephala reticvlata Ols., Bui. Am. MUB. Nat. Hist., xxxviii, p. 6, 1918. 

 Drcecvlacephala reticvlata Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 38, 1919. 



Form: Smallest of the members of this genus that occur in the state. 

 Length, 4.5 to 5.5 mm. Vertex blunt, much broader than long. Face in 

 profile convex. Pronotum longer proportionally than in other members of 

 the genus, humeral margins longer than lateral margins, posterior margin 

 distinctly emarginate. Elytra characteristic because of the numerous 

 apical reticulations. 



Color: Face lacks the dark arcs characteristic of the three preceding 

 species, being yellow or orange-yellow, as is the vertex, except for two 

 light spots which include the ocelli. Anterior portion of pronotum and 

 scutellum yellow. Disc of pronotum and scutellum grayish green with 

 nervures and costal margin light. 



External genitalia: Female, last ventral segment slightly wider than 

 long, lateral margins slightly tapering posteriorly, posterior margin with 

 median half roundingly produced; pygofers are long but rather stout, 

 equalling the tip of the ovipositor and bearing a very few stout scattered 

 hairs. Male, valve rounded on posterior margin; plates long, tapering 

 regularly to acute tips from broad base, almost equalling pygofers. 



Internal male genitalia : Styles of same type as in mollipes, but shorter 

 and stouter; connective T-shaped, but with cross piece distinctly curved; 

 oedagus much as in mollipes though smaller. 



Distribution: Should be found in the southern part of the 

 state. 



Hosts: A general grass feeder. De Long reports it from 

 Bermuda grass. It has been reported on oats and wheat. 



Subfamily GYPONIN^ (Stal). 



The members of this subfamily are for the most part large 

 forms, having a broad, somewhat flattened body. Their flat- 

 tened form, together with the fact that the ocelli are situated 

 on the disc of the vertex, is enough to separate them from the 

 other subfamilies. Three of the four United States genera 

 are known to occur in Kansas. 



KEY TO GENERA. 



A. Very short and broad, clavus truncate at tip. Penthimia. 



AA. Elongate forms, clavus not truncate at tip. 



B. Head with sharp narrow margin, elytra oblique at apex. 



Gypona. 



BB. Head with broad flat margin, elytra perpendicular at apex. 



Xerophloea. 



