HBMEPTBEA HOMOPTBEA FTJLGOELNA. 



ClXIUS.' UKSl'EKIDUM. 



PI. 6, Fig. Hi. 



Cixiitsr hesperidttm Sciidd., Hull. U. S. Geol. Geogr. Surv. "IVrr., IV, 77-J-77:! (1 



A single fragment, representing a Dearly perfect tegmen, with 

 venation, is probably to he referred to Cixins, but is unsatisfactory: tin- 

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

 projecting apex ; the teamen appears to increase very slightly in si/.c to a 

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

 the course and branching of the nervures, so far as thfty can be made out, 

 seem to indicate an insect allied to (!ixius, but no cross-veins can be seen 



Length of tegmen, <;._' : its greatest breadth, 2.5 ram . 



Green River, Wyoming. One specimen, No. .'IS, F. C. A. Kichardson. 



( 'IXIIIS ? I'lvOAVUS. 



ri. T.I. I'i.u. ii. 



An insect apparently allied not distantly to Florissantia elegans and 

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

 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 einarginate, receiving the 

 liroadly angled base of the very large, otherwise triangular scutelluni, which 

 has a line 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, bevoml which point the longitudinal veins run unforked to the 

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

 about eight in number, Mrikmg the apical margin : there appear to lie a 

 few duskv spots in the middle of these apical cells. 



Length of bodv as preserved. Id ; breadth of same, .", T.Y" n ' ; length 



of tegmina, ld.. r >""". 



Florissant. One specimen, No. 1.7nf>, rrinceton Expedition. 



OLIARUS Stal. 



A single species is referred here provisionally to indicate its appareiith 

 m-areM alliance among living forms. The genus has never been found 

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



