— 21 — 



well as the very different genitalia renders it easily separated 

 from that species. In venation it approaches Deltocephalus and 

 adds another link to the chain connecting the two genera. 



THAMNOTETTIX CILIATA N. SP. 



Green or yellowish-green, the under part of thorax and nearly all of 

 abdomen black. Head with four quadrate black spots on margin between 

 eyes and two on the vertex behind the outer ones. Length to tip of elytra, 

 female 5.50 mm., male 5 mm. 



Vertex subangulate in front, about one-half longer in middle than next 

 eye. Front tapering evenly to the broad apex, apical angles rounded; 

 clyi)eus widening but slightly to the truncate tip, nearly twice as long as 

 wide; lora; large, nearly reaching tip of clypeus, gena^ broad, sides rounding 

 reaching the clypeus by a narrow line. Pronotum one-third longer than 

 vertex, slightly emarginate postciorly, humeral margins long, lateral 

 margins short, rounded: elytra long, nari'owed, the nervures distinct, 

 becoming fainter near costa towards apex. 



Color: Head yellow with a conspicuous transverse row of four quadrate 

 black si)ots on margin of vertex extending down on to the front, two small 

 approximate s])0ts or lines on the disk about half way from occiput to tip, 

 variable in size and a spot on each side near the eye parallel to the outer 

 marginal spot, in some cases reduced to a round dot. A spot at base of 

 antennte, four or five interrupted arcs on front, and frontal sutures, black; 

 sometimes spots of black on gena:> and lorte and an annulus on second joint 

 of antenna, in female, black Pronotum, greenish transparent, with 

 anterior border more yellow; scutellum yellow; elytra greenish hyaline or 

 flavescent, the nervures yellowish or whitish and in the females usually 

 bordered with fuscous. Tergum black except margin and part of terminal 

 segment yrllow; pectus and venter black, lateral margins, posterior mar- 

 gins of b se and side margins of ultimate ventral segment, a narrow poste- 

 rior border to the segments and the pygofers of female, and usually plates 

 and pygofers of male, yellow or whitish. 



Genitalia: Female, ultimate ventral segment slightly longer than 

 penultimate, minutely rugulose;posterior margin scarcely concave; pygofers 

 large, slightly exceeded by the ovipositor and set with stiff grayish bristles, 

 those at apex stronger and darker; male, valve long, nearly a-slong as wide, 

 posterior border convex; plates short, divaricate, obtuse or truncate, and 

 bearing a few stiff hairs on disk and a dense brush of long white ciliate 

 hairs from the margin; pygofers long, exceeding plates, obliquely truncate 

 obtuse at tip, their margins set with a series of stiff hairs. 



Described from 'numerous examples of both sexes collected 

 in Iowa and one female from Colorado (Gillette). Adults at 

 Ames from June 2d to July 2d, and from August 27th to Octo- 

 ber 9th. Three specimens from Little Rock July 2d (Ball), and 

 two from Algona, Iowa, May 9th (Mally). 



This species presents many striking resemblances to smithi; 

 ia.f act, specimens of smithi having the frontal black band inter- 



