LAWSON: KANSAS CICADELLIDJE. 113 



A. Head flattened concluded. 



D. Species unstriped or with longitudinal yellow 

 stripes on vertex and pronotum; females brachyp- 

 terous. Hecalus. 



DD. Species with converging red lines on vertex and 

 pronotum, both sexes macropterous. 



Spang bergie lla . 

 BB. Head thin but not foliaceous. 



C. Greenish species, elytra not ramosely pigmented. 



Parabolocratus. 



CC. Brownish species, elytra more or less ramosely pig- 

 mented. Dicyphonia. 



AA. Head not flattened, anterior margin neither sharp nor foliaceous. 

 B. Vertex longer than wide or not much wider than long, disc 

 flattened, separated from front by more or less of a distinct 

 margin. 



C. Elytra with three anteapical cells. 



D. One cross vein between sectors of elytra. 



Scaphoidcus. 



DD. Usually two cross veins between the sectors of 

 elytra. 

 E. Vertex greatly produced and acutely angled, 



front long and narrow. Platymetopius. 

 EE. Vertex moderately produced, front broad, 



clypeus narrowed at tip. Deltocephalus. 

 CC. Elytra with two anteapical cells. Lonatura. 



BB. Vertex usually much wider than long, disc sloping and margin 

 rounding to front. 



C. Inner sector of elytra twice forked, elytra with three 

 anteapical cells. 



D. Inner branch of first sector forking on disc of 

 corium. 



E. Elytra usually short, seldom longer than ab- 

 domen, often very short, vertex large. 

 F. Ovipositor long, exceeding pygofers. 



G. Gray, or with golden iridescence. 



Aconura. 

 GG. Black or dark species. 



Driotura. 



FF. Ovipositor short, seldom exceeding py- 

 gofers. Euscelis. 

 EE. Elytra longer, usually distinctly exceeding 

 abdomen; vertex smaller. 

 F. Elytra marked with fine ramose pig- 

 ment lines, or, if not, with transverse 

 furrow on vertex. 



G. Ramose lines, if present, restricted 

 to a cross band behind middle of 

 elytra. 



H. Elytra with one cross ner- 

 vure between sectors. 

 Eutettix. 



