296 TERTIARY INSECTS OF NORTH AMERICA. 



PLAXOPHLEBIA Snulder (a-Ad?, <pAe. 



Planophlebia Scudd., Rep. Pro^r. Ge.il. Surv. Can., 1:377-1373, B, 1--.V1-.; ,. 1-7'J). 



This name is proposed for a genus of Fulgorina apparently belonging 

 to the Delphacida," but differing from all Homo ptera I have seen in the 

 remarkable trend of the principal veins of the 'tegmina, nearly all of which, 

 and certainly all the branches of the radial, as well as most of the branches 

 of the ulnar vein, terminate upon the coxtnf margin, .the costal areole being 

 very brief, or less than one-third the length of the tegmina. The radial 

 vein branches very near the base of the tegmina, and its lower branch again 

 a vrrv little wav beyond, all three of the branches running in a straight 

 course parallel to one another, and embracing at tip the middle third of the 

 margin. The ulnar vein forks near the outer branching of the radial vein, 

 the upper branch soon dividing again, the lower dividing bevond the middle 

 of the tegmina, all the branches running parallel to those of the radial vein. 



I know of no homopteron the veins of whose tegmina trend as in this 

 genus ; indeed it appears to be quite abnormal in this particular. Xor can 

 Mr. Uhler, to whom I submitted a drawing, find any form whose branched 

 veins run toward the costal margin ; but I have in vain attempted to believe 

 that I have interchanged the two margins of the tegmina In point of neu- 

 ration the tegmina approach most closely, as Mr. Uhler has pointed out to 

 me, to those of Amphiscepa bivittata (Say), but even from this it differs 

 widely. 



PLAXOPHLEBIA GIGANTEA. 



PI. 2, Fig. 1C. 

 Planoplilebia gigantea Scudd.. Rep. Progr. Geol. Surv. Can., 1877-1876, B, 186 (1870). 



The specimen is very fragmentary, consisting of an upper wing, of 

 which the whole of the costal border as far as the tip, and the basal half of 

 the inner margin, can be made out ; but only three patches of the surface 

 with its accompanying veins are preserved a piece next the base, crossing 

 the wing ; another near the middle, which crosses rather more than three- 

 quarters of it from the costal margin backward ; and a greatly broken 

 patch at the upper half of the tip ; but from these pieces nearly the whole 

 of the neuration, as given in the generic description, can be determined. 

 The costal vein appears to be forked close to the base, with branches run- 

 ning close and subparallel to each other. There are five branches of the 

 ulnar vein, terminating above the middle of the apical margin of the teg- 



