LAWSON: KANSAS CICADELLID^. 237 



Form: That of the preceding. Length, 3.5 to 4 mm. Head narrower 

 than the pronotum, blunt anteriorly, the vertex one-half wider than long. 

 Pronotum twice as wide as long, broadly rounded anteriorly, lateral 

 margins fairly long, posterior margin somewhat emarginate. Elytra very 

 long, greatly exceeding the abdomen. 



Color: The specimens at hand are almost uniformly orange-yellow, 

 the elytra pale apically, and often with a pruinose spot along costal 

 margin. Beneath and legs the same color except for the black tarsal 

 claws. 



External genitalia: Male, last ventral segment half longer than the 

 preceding, strongly narrowed posteriorly, keeled posterior margin trun- 

 cate or slightly emarginate; valve present, but hidden under last ventral 

 segment unless the latter be raised up, small and rounded posteriorly; 

 plates very large, suddenly narrowed preapically and then parallel- 

 margined to the blunt bristly apices which far exceed the pygofers. 



Distributio7i: Specimens are at hand from Douglas county 

 and also from Kansas City, Mo., indicating its occurrence in 

 the eastern portion of the state. 



Hosts: Unknown. 



Genus Dikraneura Hardy. 



The members of this genus are small and quite slender. The 

 vertex is usually obtusely produced anteriorly. The elytra 

 greatly exceed the abdomen but lack an appendix, thus differ- 

 ing from Alebra. The sectors of the hind wings all end in a 

 marginal vein and there are two apical cells, differing in the 

 latter respect from Empoasca where only one apical cell is 

 found. 



Two species of this genus have been collected in Kansas. 

 These may be separated by the following key : 



KEY TO SPECIES. 



A. Vertex strongly produced, two reddish longitudinal lines on vertex 

 and pronotum. ahnormis. 



AA. Vertex shorter, usually reddish apically, without longitudinal lines. 



fieberi. 



Dikraneura ahnormis (Walsh). 



Chloroneura ahnormis Walsh, Proc. Bost. Soc. Nat. Hist., ix, p. 316, 1864. 

 Dicraneura ahnormis Woodw., Psyche, v, p. 213, 1889. 

 Dicraneura ahnormis Gill., Proc. U. S. Natl. Mus., xx, p. 719, 1898. 

 Dicraneura ahnormis DeL., Tenn. St. Bd. Ent., Bui. 17, p. 98, 1916. 

 Dikraneura ahnormis Yan D., Cat. Hemip. N. A., p. 700, 1917. 

 Dikraneura ahnormis Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 110, 1919. 



Form: Very slender. Vertex over twice as long at middle as next the 

 eye, one-third wider than long, acutely angled apically. Pronotum long 

 and narrow, one-half longer than vertex, lateral margins long, slightly 



