HEMirTERA IIOMOPTERA JASSIDES. 307 



The costal margin of the tegmina is greatly thickened and regularly and 

 considerably arcuate, giving an uniisnally ovate shape to the whole, which 

 is increased by the somewhat pointed though rounded apex. The tegmina, 

 which are less than three times as long as broad, appear to In- tenuous, and 

 tin- veins, though not the sutura clavi, are vrrv indistinct. The body is 

 uniformly dark and parallel-sided. 



lireadth of body, f)""" ; length of tegmina, 575 mm ; breadth, 2 mm ; 

 length of hind tibia-, ;!.25""". 



Florissant, Colorado. One specimen, No. 78. 



4. AGALLIA ABSTKUCTA. 



Tl. 19, Fig. 5. 



Head as broad as the uniformly broad thorax. Tegmina barely extend- 

 ing to the tip of the abdomen, long oval, almost three and a half times as 

 long as broad, the costal border regularly and very little arcuate, the apex 

 strongly convex; the nlnar vein forks at the end of the proximal third of 

 the wing, and the upper branch is immediately united by a recurrent cross- 

 vein, longer than the pedicel of the upper ulnar, to the radial vein, the latter 

 running into the margin not far before the tip but uniting with it by no 

 cross vein ; scarcely bevond the middle of the wing the radial and upper 

 ulnar veins are united by a bent cross-vein, from the middle of which springs 

 a veinlet, dividing the area between them, and at just about half-way to tin- 

 tip all the veins are united by a transverse series of uradate cr<>ss-veius, 

 bevond which the discontinuous longitudinal veins diverge, producing apical 

 cells distinctly broader at the margin than at base 



Length of body, 4.5 mi "; tegmina, 3.7"""; breadth of body, 1.5"""; teg- 

 mina, 1.1 ...... . 



Florissant. One specimen, No. 2658. 



GYPONA Gei mar. 



The only reference of a fossil to this oemis is in my first mention of 

 the llomoptera collected by heiiton on the \Vhite River, as belonging to 



p-nera " allied IIP Is- 1 is, ( i vpona, and I >elpha\." Since tin MI the,-.' ha\ e bi-.-n 

 described under the genera Apliana, helphax, Tetti;_;-oiiia, and BythosCOpUS 

 The one now described below is referred here only in a L:eiierai and \aguo 



Sell>e, a8 il i> too ill preserved to .speak of it witll confidence. 



