PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued i^5fv.j4- \)*MI ^U '^« 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 85 Wwhington: 1938 No. 3036 



REVISION OF THE NEARCTIC LEAFHOPPERS OF THE 

 TRIBE ERRHOMENELLINI (HOMOPTERA: CICADEL- 

 LIDAE) 



By P. W. Oman 



The studies here presented are based on material in the United 

 States National Museum and on specimens lent for study by Dr. E. D. 

 Ball, of the University of Arizona, Dr. R. H. Beamer, of the Uni- 

 versity of Kansas, and J. A. Gillett, of Twin Falls, Idaho. Since 

 representatives of the tribe are usually not abundant in collections, 

 these loans have aided materially in the jn-eparation of a revisional 

 paper. 



According to the available distribution records, the North Ameri- 

 can representatives of the group are confined to the western part of 

 the United States; however, it is probable that certain species occur 

 in adjacent sections of Canada and Mexico as well. All the species 

 appear to be confined to arid or semiarid regions. Little is known 

 concerning food-plant associations, but Errhomus appears to be re- 

 stricted to the Artemisia belt, Pagaronia and Lystndea occur in the 

 coastal cha])arral association, while Fiiscanus friscanus is apparently 

 confined to Lup'/nux ailjorcus. 



The tribe Errhomenellini has usually been considered to be some- 

 what intermediate in character between the subfamilies Cicadellinae 

 and Jassinae. In this view I concur but believe that the tribe should 

 be referred to the Jassinae rather than the Cicadellinae, where it Avas 

 placed by Van Duzee in his Check List, 1916, and Catalogue, 1917. 

 It is assigned to the Jassinae because the ocelli are usually near the 

 51701—38 1 163 



