REVISIOiSr OF TRIBE ERRHOMENELLTNI — OMAIST 177 



as wide, lateral margins long and distinctly carinate, posterior margin 

 shallowly incised, surface irregularly transversely striate on posterior 

 one-half. Scutellum large. Fore wing of male long, extending well 

 beyond tip of abdomen; venation irregular, second cross vein extend- 

 ing obliquely distad from media to cubitus, appendix nearly absent; 

 texture subcoriaceoiis, surface sparsely pilose along veins. Costal 

 area of hind wing much wider basally than near hamulus. Female 

 unknown, probably brachypterous. Pecten of hind basitarsus com- 

 posed of five or six setae, these not clearly differentiated from the 

 numerous setae covering the lower surface of the tarsal segment. 



Male valve A'ery small ; plates long and slender ; styles exceedingly 

 long; py gofer with a pair of hooklike jirocesses next to anal tube; 

 sternal apodemes absent. 



Type of the genus, Thatuna gilletti^ new species. 



THATUNA GILLETTI, new species 



Plate 6, Figures 14-14B 



Length of male 8.5 mm. Ground color sordid yellowish white, 

 heavily mottled with fuscous to black. Fore wing with numerous 

 sordid white spots, the largest of these being along coastal margin 

 or apically on veins. Hind wing smoky subhyaline. 



Male plates turned upward distally, apices slightly diverging. 

 Styles extending beyond plates, curved upward posteriorly, each with 

 a small toothlike process on outer ventral surface at about the 

 middle of posterior portion. Aedeagus broad basally, tapering 

 distally, curved first caudad and dorsad, then bent abruptly ventrad 

 at the distal end of the ejaculatory duct and bent again so that the 

 terminal portion is directed ventrad and cephalad, bearing at the 

 opening of the ejaculatory duct a pair of slender processes which 

 extend laterad and slightly cephalad; distal portion forked. Hook- 

 like processes of pygofer stout, pointed, and directed ventrad distally. 



Type locality. — Moscow, Idaho. 



Type and paratypes. — U.S.N.M. no. 52225. 



Paratypes. — In collections of J. A. Gillett, E. D. Ball, and Uni- 

 versity of Kansas. 



Remarks. — Described from a series of 10 male specimens as fol- 

 lows: Holotype and six paratypes from the type locality. May 31, 

 1931, J. Gillett; two paratypes from Cedar Mountain, Moscow, Idaho, 

 June 24, 1920, M. C. Lane; and one paratype from Troy, Idaho, 

 May 31, J. M. Aldrich. 



I take pleasure in naming this unusual species for Joseph A. Gillett, 

 who has collected many interesting leafhoppers in Idaho. 



