216 THE UNIVERSITY SCIENCE BULLETIN. 



External genitalia: Female, last ventral segment about length of the 

 preceding, composed of two membranes, the outer strongly narrowed pos- 

 teriorly, exposing the sides and lateral angles of the inner, posterior 

 margin of the outer nearly truncate, sometimes slightly emarginate; 

 pygofers short and stout, nearly equalling ovipositor, distal half quite 

 bristly. Male, valve broad and short, broadly rounded posteriorly; plates 

 broad basally, spiny margins slightly convex, tips acute, exceeded by the 

 strongly bristled pygofers which, viewed laterally, are triangular, drawn 

 out into long, attenuate, and acute apices. 



Distribution: Taken in Cherokee and Douglas counties. 

 Hosts: Probably a grass feeder. 



Thamnotettix nigrifroyis (Forbes). 



Cicadula nigrifruns Forbes, 14th Rept, 111. St. Ent.. p. 67, pi. 5, fig. 3, 1864. 

 Thamnotettix perpiinctata Van D., Bui. Buf. Soc. Nat. Sci., v, pp. 200, 212, 1894. 

 Deltocephalus mgrifron.s O. & B., Proc. la. Acad. Sci., iv, p. 218, 1897 (part). 

 Thamnotettix perpiinctata Bak., Psyche, viii. p. 116, 1897. 



Deltocephalu-s nicirifrons Csb., U. S. Dept. Agr., Bur. Ent., Bui. 108, p. 77, fig. 14, 

 1912 (part). 



Thamnotettix nif/rifrons Van D., Cat. Hemip. X. A., p. 684, 1917. 

 Thamnotettix nif)i-ifrons Lathr., S. C. Agr. E.\.p. Sta., Bui. 199, p. 81, 1919. 



Form: Smaller than preceding species. Length, 3.25 to 4 mm. Ver- 

 tex wider than long, one-third longer at middle than next the eye, round- 

 ingly obtuse apically. Pronotum nearly one-half longer than the vertex, 

 not twice as wide as long, anterior margin strongly convex, lateral mar- 

 gins very short, humeral margins long, posterior margin very slightly 

 emarginate. Scutellum broad. Elytra long and narrow, strongly over- 

 lapping apically, only one cross nervure between the sectors. 



Color: Yellowish-green; Vertex yellowish, with four large black mar- 

 ginal spots, ocelli black, median longitudinal line brown. Pronotum with 

 whitish or yellowish spots along anterior margins sometimes with black 

 showing through the disc. Scutellum yellowish or whitish, with basal 

 angles and apex rather more strongly yellow, and with black transverse 

 impressed line. Elytra subhyaline, rather smoky apically, nervures whit- 

 ish or yellowish. Face yellow, stiongly marked with black coalescing arcs. 

 Beneath black marked with yellow. 



External genitalia: Female, last ventral segment as long as preceding, 

 composed of two membranes, the outer strongly narrowed posteriorly, ex- 

 posing lateral angles of the shorter inner membrane, posterior margin of 

 outer membrane truncate or elevated and seemingly broadly emarginate; 

 pygofers long, slightly exceeded by ovipositor, bristly, especially on distal 

 half. Male, last ventral segment as long as preceding; valve broad and 

 short, posteriorly broadly rounded; plates broad and triangular, spiny 

 margins rather slightly concave to acute apices which are slightly ex- 

 ceeded by the bristly and acute pygofers. 



