176 PROCEEDINGS OF THE NATIONAL MUSEUM vol.85 



rather short and pointed. In the type a dorsal toothlike projection 

 is much more prominent than in either of the two paratypes, which 

 may represent a still different segregate. 



Type locality. — Easton, Wash. 



Type and paratype. — U.S.N.M. no. 52223. 



Paratype. — University of Kansas collection. 



Remarks. — Described from three macropterous males ; the holotype 

 collected by A. Koebele (no date), one paratype from Wenatchee 

 Mountains, Wash., July 9, 1930, F. P. Dean, and one paratype from 

 Mount Rainier, Wash., July 6, 1935, R. H. Beamer. 



ERRHOMUS (CARSONUS) ARIDUS INCERTUS, new subspecies 



Slightly larger than typical andus; length of female 6.75-7 mm. 

 Compared with typical aHdus the crown is shorter, the clypeus more 

 convex, and the posterior lateral angles of the seventh sternite of the 

 female are less produced. 



Type locality. — Cajon Pass, Calif. 



rype^.— U.S.N.M. no. 52224. 



Remarks. — Described from a series of 82 females (holotype and 

 paratypes) collected at the type locality by the writer and Mrs. Oman, 

 June 6, 1935. 



Distribution. — In addition to the types, other female specimens 

 are at hand from the following California localities : Warner Springs 

 (Oman), Macdoel (Oman), Doyle (Ball), Chilcoot (Ball), and 

 Dorris (Beamer). 



THATUNA, new genus 



Closely related to Bathysmatophorus ^ Sahlberg, with which it 

 agrees in general habitus and in the structure of the head and pro- 

 notum, but differing from that genus in the venation of the fore 

 wing, which has the outer anteapical cell small and triangular and 

 the central anteapical cell usually open basally. 



Large, rather elongate leafhoppers. Head, including eyes, nar- 

 rower than pronotum ; face rather short and sparsely pilose ; clypeus 

 greatly swollen, especially near base of clypellus; margin between 

 face and crown blunt and indefinite; crown rather short, surface 

 uneven and with a few irregular, mostly longitudinal striae. Ocelli 

 small, eyes somewhat bulbous. Pronotum about one-half as long 



*I am not familiar with B. reuteri Salilberg, 1871 (Notiser ur siillsliapets pro fauna et 

 flora Fennica fOrhandlingar, vol. 12, p. Ill), the type of Bathijsmatophorus, and my con- 

 cept of the genus is based upon a study of the original description and Fieber's illustrations 

 on pi. 10 of Rev. et Mag. Zool., 1876. 



