278 TERTIARY INSECTS OF NORTH AMERICA. 



diverging- from it angularly toward the costal margin just before the end of 

 the proximal third of the wing, and just before reaching the margin bend- 

 ing abruptly outward jmrallel to the lower branch, not really reaching 

 the margin until toward the apex of the wing. In the cubital vein the 

 lowermost fork makes a continuous, regular and rather strongly arcuate 

 curve with the discoidal portion, striking the margin just before the middle 

 of the wing ; the upper branch of the lower fork parts from this just about 

 opposite the forking of the subcostal, while the upper fork, not so wide as 

 the lower, arises at three-fifths the distance from the base of the wing, 

 making the inclosed cell of unusual length for Psyllidse ; the upper branch 

 of this fork falls scarcely below the apex of the wing, and the tips of the 

 cubital forks fall at subequidistant intervals along the margin, the lower 

 cell the wider. 



Length of body, 3°-"; wing, 2.5"'°; breadth of latter, 1.2'"'". 



Florissant. One specimen. No. 6712. 



Family FULGORINA Burmeister. 



This family is fairly well represented in Tertiary deposits and by a 

 considerable variety of forms, all the subfamilies being represented except 

 the Tropiduchida, Derbida, and Lophopida; and, what is curious, each of the 

 subfamilies is represented both in European and American strata, excepting 

 only the Issida, confined to Europe, and the Achilida, found only in Amer- 

 ica, each .by a single species, the one in Radoboj, the other at Florissant. 

 In Europe the Fulgorina are represented by Poeocera in amber, the Dictyo- 

 pharida by Pseudophana both in amber and at Oeningen, the Cixiida by 

 Cixius in amber, the Delphacida by Asiraca at Aix, the Ricaniida by Rica- 

 nia in amber, and the Flatida by Flata, also in amber. The only one of 

 these genera recognized in America is Cixius, and that doiibtfully ; but 

 these subfamilies are far better represented, and in some instances by new 

 and peculiar types. Thus of Fulgorida we have Nyctophylax, Aphana, 

 Lystra, and Fulgora, all with more than one species, from various locali- 

 ties ; of Dictyopharida, a Dictyophara from Florissant ; of Cixiida, not only 

 Cixius but Oliarus, Diaplegma, Oliarites, and Florissantia, all but the first 

 peculiar types and Diaplegma with no less than seven species — all these from 

 Green River and Florissant ; of Delphacida, Delphax, and Planophlebia, 

 the latter a remarkable extinct type from British Columbia ; of Ricaniida 



