NO. 1141. 



.1 MJ'JRJCAN PALEOZOIC INSECTS— HA XDLIliSCH. 



fi78 



into two branches, which continue almost parallel and close to the 

 media to the middle of the wing without further division. Half the 

 width of the wing is taken up by the three widely separated anal 

 veins, the ofl'shoots of which are forked and branch oil" backMard, 

 The costal area and the entire space below the cubital vein are very 

 irregularly and coarsely reticulate, while the spaces between the other 

 veins are l)ridged over by isolated cross veins. 



HYPERMEGETHES SCHUCHERTI, new species. 



LocdJ/ti/. — Mazon Creek, near Morris, Illinois. Pennsylvanian; 

 Kittanning-^ (Allegheny) stage. 



The basal half, 60 mm. long, of a Aving about 120 mm. in length. 



Daniels collection. Reverse of holotype in the (/. S. Mational 

 Museum: Cat. No. 36575. 



Fig. 2.— Hypeh.mecethes schucherti. 



Family LITHOMANTID^E, new family. 



In man}' respects, this group is closely allied to the Dictyoneuridre, 

 l)ut ditiers in the less frequent cross veins pertaining to the intercalary 

 venation, which are only occasionally reticulate. The branching of 

 the principal veins is scarcely more abundant than in the Dictyoneu- 

 ridfe, and as in that grouj) we here find the familiar isolated anterior 

 In-anch of the media and of th(^ cubitus, the marginal costa, and the 

 simph^ radius, whose sector sends off several divided branches back- 

 ward. Also, the veins of the anal and cul)ital groups extending in 

 gentle curves to the outer margin are here present as in the Dictyo-r 



