114 THE UNIVERSITY SCIENCE BULLETIN. 



AA. Head not flattened — concluded. 



HH. Elytra with two cross ner- 

 vures between the sectors or 

 supernumerary veinlets to 

 costa or both. 



I. Anterior margin of ver- 

 tex rounding to front, 

 no black line under ver- 

 tex. Aligia. 

 II. Anterior margin of ver- 

 tex acutely angled with 

 front, black line under 

 vertex. Mesamia. 



GG. Ramose lines always present, not 

 restricted to transverse band, 

 Phlepsius. 



FF. Elytra not marked with ramose pig- 

 ment lines. 



G. Elytra with apex pointed. 



Acinopterus. 

 GG. Elytra with apex rounded. 



H. Vertex usually distinctly 

 longer medially than next 

 the eye, sides of pronotum 

 short; species usually slen- 

 der. Thainnotettix 

 HH. Vertex usually not much 

 longer medially than next 

 the eye, sides of pronotum 

 longer; species usually 

 broad and green. 



Chlorotcttix. 



DD. Inner branch of first sector not forked on disc of 

 corium. 



E. Vertex not produced, scutellum very large. 



Jassua. 



EE. Vertex well produced, scutellum smaller. 



Neoccplidia. 



CC. Inner sector of elytra not forked, elytra with two ante- 

 apical cells. 



D. Wing with 3 apical cells. Cicadula. 



DD. Wing with 2 apical cells. 



E. Head narrower than pronotum. 



Balclutha. 



EE. Head wider than pronotum. 



Eugnathodus. 



Genus Dorycephalus Kirsch. 



This genus is at once characterized by the unusually pro- 

 longed foliaceous vertex. They are grayish or brownish, stick- 

 like insects, especially the brachypterous forms. 



Both the North American species occur in Kansas. 



