HEMIPTERA— nOMOPTERA— FULGORINA. 287 



ClXIUS? HESPERIDUM, 



PI. 6, Fig. 19. 



Cixiuaf hesperidum Scudil., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 772-773 (1878). 



A single fragment, representing a nearly perfect teginen, with obscure 

 venation, is probably to be referred to Cixius, but is unsatisfactory ; the 

 costal border is gently and regularly convex, the tip well rounded, with no 

 projecting apex ; the tegmen appears to increase very slightly in size to a 

 little beyond the middle, up to which point the borders are nearly parallel ; 

 the course and branching of the nervures, so for as they can be made out, 

 seem to indicate an insect allied to Cixius, but no cross-veins can be seen 



Length of tegmen, 6.2'°'" ; its greatest breadth, 2.5"™. 



Green River, Wyoming. One specimen, No. 38, F. C. A. Richardson. 



Cixius! proavus. 

 PL 19, Fig. 14. 



An hisect apparently allied not distantly to Florissantia elegans and 

 but little smaller than it, but with considerable difference in the neuration 

 of the tegmina. The head is not preserved, but must have been at least as 

 narrow as there, the thorax being transverse but triangular and longer than 

 in Florissantia, although its apex is angularly emarginate, receiving the 

 broadly angled base of the very large, otherwise triangular scutellum, which 

 has a fine mesial sulcation. Tegmina surpassing the abdomen moderately, 

 with no pterostigma, the first cross-veins, at which the longitudinal veins 

 are forked and new cells arise, crossing the middle of the apical two-thirds 

 of the wings, beyond which point the longitudinal veins run unforked to the 

 margin, so that there are but a basal and an apical series of cells, the latter, 

 about eight in number, striking the apical margin ; there appear to be a 

 few dusky spots in the middle of these apical cells. 



Length of body as preserved, 10"""; breadth of same, 3.75""" ; length 

 of tegmina, 10.5'""'. 



Florissant. One specimen, No. 1.705, Princeton Expedition. 



OLIARUS Stal. 



A single species is referred here provisionally to indicate its apparently 

 nearest alliance among living forms. The genus has never been found 

 fossil, but all of the known fossil Cixiida are nearly allied to it. 



