302 Handlirsch — Nexo Paleozoic Insects from the 



margin. Farther backward follow 6 simple short anal veins, 

 vaulted in the characteristic manner. Interstices filled with 

 irregular network resembling that of the Dictyoneuridse, to 

 which family this fossil possibly may belong. 



Holotype in Peabody Museum, Yale University, Cat. No. 

 20. 



Diexodus, new genus. 



Diexodus debilis, new species. Fig. 5. 



The specimen consists of 21 mm of the basal half of a left 

 (? posterior) wing. Costal area moderately broad, pointed. 

 Costa and subcosta nearly straight, radius close to and parallel 



Fig. 5. 



Fig. 5. Diexodus debilis (negative), x 2 - 8. 



with the subcosta, sector rising at about a quarter of the length 

 of the wing. The media sends forth its first branch somewhat 

 distally of the origin of the sector and splits soon after into 

 2 branches. Cubitus forked very near the base, the anterior 

 main branch splitting into 2 branches, the first of which again 

 splits into 3 twigs running in a long vault to the posterior 

 margin, the second forming only a long fork. The second 

 main branch remains undivided. Of the 5 anal veins to be 

 seen, some may have a common stem. Cross veins widely 

 spread. 



This species possibly may belong to the Lithomantidse. 



Holotype in Peabody Museum, Yale University, Cat. No. 21. 



Scepasma, new genus. 

 Scepasma gigas, new species. Fig. 6. 



A fragment, 60 mra long, of the anal region of a posterior 

 wing which had probably a length of 180 mm and evidently was 

 very broad. There are preserved : a strong vein, split into 3 



