674 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



neuridiB. I would unite these groups were it not that in sonic known 

 species, the form of the bod}- differs striivingh' from that of the dict3'o- 

 neurids. In an}' event, however, the two oroups are closely related. 

 The famil}^ Lithomantid^, the type of which is Llthoraantis car- 

 honarla Woodward, includes a number of beautiful forms from the 

 middle and upper parts of the Upper Car))oniferous of Europe, to 

 which I now add two American species. 



EURYTv^NIA, new genus. 



Of this form there is, unfortunately, onl3^a large portion of the mid- 

 dle of the wing- preserved. Tlu^ anterior margin is rather strong!}' 

 curved, the inner margin, on tlic contrary, is almost straight, so that 

 one can infer a longer wing of nearl}' e(pial width. Costa, subcosta, 

 and radius are separated by l)road interspaces, and run nearly parallel, 

 as does also the radial sector, which originates immediately back of 

 the base of the wing, but which first widely branches in the apical half. 

 The media extends in a long curve to the inner border and sends off its 

 anterior branch far al)ove the center of the wing. In contrast to most 

 related forms, this branch dichotomizes. The inferior branch of the 

 media divides into a number of branchlets, which are repeatedh' bent. 

 The long superior branch of the (Uibitus remains undivided, and forms 

 a very long curve, while the lower branch of the cubitus separates into 

 three veinlets, which like the anal veins extend in a Hat curve to the 

 outer margin. All interspaces are bridged over by numerous straight 

 and close, mostly obliquely arranged cross veins. 



EURYTiENIA VIRGINIANA, new species. 



Locality. — Gibson Fork of Fifteen-mile Creek, above Decota, West 

 Virginia, "60 feet above coal locality called 'Keystone.'" Upper 

 Pottsville; Lower Kanawha series. 



Fig. 3. — EUKYT.KNIA VIBGINIANA. 



Length of fragment preserved, 8+ nun. ; probable length of the entire 

 wing, 55 to 60 mm. 



Holotyxje.—Q>2X. No. 25631, U.S.N.M. 



