46 S. I. Smith on a Fossil Insect from Indiana. 



the sixth nervure is wanting in the specimen, but undoubtedly 

 divides at its origin. The outer branch forks a short distance 

 from the margin, and the outer of these branchlets, and proba- 

 bly the inner also, again fork very near the margin. The inner 

 l)raiK-h forks about the middle of its course, both these siv. 



"All the interspaces are tilled by a riiiely reticulated aii^: 

 .K-Heate net-work ot iniuute nervures, but there are no stn. _ 



tioin the seeoud iiervure to the anterior margin, which are stronger 

 than the general net-work, but still seem to be a part of it. 



This wing dilfers so much in neuration from any famiiyof 

 recent insects, that it is difficult to point out any near affinity 

 with living forms, although it shows some points of resemblance 

 to several families of Neuroptera, and especially to the Epheme- 

 rids. To Hemeristia and Iliamia, described and figured by Prof. 

 Dana* and Mr. Scudder,f from the Carboniferous formation at 

 Mazon creek in Illinois, it shows more resemblance, but still 

 differa more from either of these genera, which are considered 

 distinct famihes by Mr. Scudder, than they do from each other. 

 From the forms described bv Mr. Scudder in the third volume 

 of the Geological Survey of Illinois, it is even more widelv 

 separated. 



To the species described from the European Carboniferous, 

 it seems to be still more closely allied. Prof Hagen, to whom 

 a tracing of the specimen was sent, is of the opinion that it ^vill 

 be found to belong to the same genus as the Victyoneura lihelh- 

 hides of Goldenberg.:|: Prof Hagen, also, regards the remark- 

 able Eugereon Bockingi Dohrn,§ which has attracted so much 

 attention, as the same genus, and perhaps the same species, i^-" 

 D. UheUnhides. In both Dictyoneura and Eugereon, as figareil. 

 the wings liave considerable resemblance to the specimen IVoin 

 Indiana, but in neither of them are the nervures so numerously 

 in-iuiched toward the posterior border of the wing, and in /-«• 

 'I'-r.on the spaces between the three first nervures ^lext the an- 

 terior border are connected by straight cross-nervures. There 

 are also important difierences in the branching of the mam 

 nervures, Eegarding these differences as at least of genenc 

 value, I propose to institute a new genus for the species froni 

 Paoli, and call it Paolia vetusta. 



* This Journal, voL xixvii, pp. 34, 35, figs. 1, 2, 1864. 



t This Journal, vol. il, p. 268, 1865, and Memoira Best See Nat. Hist, vol. l 



tographicis von Bunker und Meyer, Band iv, 185 

 § Euvreron Bockingi. eine neue Insectenform e 

 ontographica von Bunker, Band liii, 1866, pi. 41 



