Lawson: Membracid.e of Kansas. 81 



Tlie genus is represented by at least nine species in Kansas, which 

 live on various species of oaks. 



Van Duzee divides the genus into four subgenera which he sepa- 

 rates by the following key : 



KEY TO SUBGENERA. 



Pronotum strongly inflated posteriorly, the crest forming an inflated cyst be- 

 fore and behind the median pale spot. Xantholobus. 



Pronotum not strongly inflated, the crest however, usually more or less dis- 

 tinctly compressed on the median spot 1 



1. Dorsal crest low and sinuated at the middle; form elongated and 

 much depressed. Evashmeadea. 

 Dorsal crest not distinctly sinuated above 2 



2. Crest highest anteriorly over or before the humeral angles, the dor- 

 sum sloping and nearly rectilinear to the apex. Atymna. 

 Crest regularly arcuated above in the more typical examples, or in 

 any case with the highest point at or near the middle. 



Cyrtolobus. 



Subgenus Cyrtolobus Coding. 



KEY TO SPECIES. 



A. Dorsum without anterior notch or depression. 



B. Crest well developed. celsiis. 



BB. Crest distinctly lower. fenestratus. 



AA. Dorsum with anterior depression before elevation. 



B. Crest arising before humeral angles. fuliginosus. 



BB. Crest arising behind humeral angles. 



C. Large species, at least 9 mm. in length. tuberosus. 



CC. Small species, not over 7 mm. in length. 



D. Crest low or obsolete. 



E. Species distinctly brownish. griseus. 



EE. Species distinctly greenish. cinereus. 



DD. Crest well developed; pronotum with distinct oblique 

 bands. vau. 



Cyrtolobus celsus Van Duzee. 



Cyrtolobus celsus Van Duzee, Check List Hemip., p. 60, 1916 (n. n. for fenestratus 

 Van D.). 



Cyrtolobus fenestratus Van Duzee, Bui. Buf. Soc. Nat. Sci., ix, p. 81, 1908. 



The following is the original description: 



Pronotum well elevated, highest at about the middle, almost regularly arcu- 

 ated from base to tip, the dorsal line a very little broken at the posterior vitta. 

 Head and the pronotum anterior to the oblique line pale yellowish testaceous, 

 punctured and varied with brown; from above each eye a brown indefinite 

 vitta curv^es backward over the humeral angle; anterior oblique vitta almost 

 perpendicular at first, approaching the elongated median mark, then deflected 

 and again widened at apex so as to pass almost straight across the dorsal 

 carina ; posterior vitta transverse, represented in my Atlanta specimen only by 

 a narrow spot on the carina; the surface behind the anterior vitta darker, in 

 one example almost piceous. Elytra hyaline, the smoky apex small and palo. 



