NU.1441. AMERICAN PALEOZOIC INSECTS— II ANDLIRsrH. 749 



IMotype.—Q'At. No. 35381, U.S.N.M. 



Collected by Messr,s. M. R. Campbell and W. C. Mendenhall, of the 

 U. S. Geological Surve}-. 



POXYNOBLATTA TRIANGULARIS ( Scudder) . 

 l'(ir(iiny/(icrii< fri<n)(jiilarifi Scuj)dek, Bull. U. S. Cieol. 8urv., No. 124, 1895, p. 52, 



pi. Ill, lig. ;;. 

 Locality. — Mazoii Creek, near Morris, Illinois. Pennsylvanian; 

 Ivittanning i (AUeghen}) stage. 



Bolotype.— Cut. No. 3S046, U.S.N.M. 



POXYNOBLATTA AMERICANA (Scudder). 



AiitliracuhlaUina americaua Scudder, Bull. U. S. Geol. Siirv., No. 124, 1895, p. 129, 

 pi. xi, fig. 7. 



Locality. — Clinton, Missouri. Pennsylvanian; Kittanning (Alle- 

 gheny) stage. 



Jlolotype. ^Cilt. No. 3816^, U.S.N.M. 



DISCOBLATTA, new genus. 



Front wing not ([uite twice as long as ])road, oxal. Costal area 

 extending two-thirds the length of the wing, wide, with few veins 

 very o))liquel3' arranged. The branches of the slightly vaulted radius 

 continue obliquely to the anterior margin and the first of these sepa- 

 rates into 3 twigs, while the 4 succeeding ones are sim})le or furcate. 

 The media sends out 2 strongly compound branches forward, nearly- 

 horizontally, to the apical border. The well-developed, slightly 

 vaulted cubitus advances to the lower end of the apical border, 

 which it entirely tills with its 8 more or less compound branches. 

 The anal area is comparatively short, and is limited bv a strongly 

 curved vein. No mention is made of cross veins. 



DISCOBLATTA SCHOLFIELDI (Scudder). 



FJohlatt'nia scholfiddi Sccdder, Bull. U. S. Geoi. Surv., No. 101, 1898, ].. 15, pi. ii, 

 fig. b; No. 124, 1895, p. 71, pi. iv, fig. 7. 



Locality. — East ProA^dence, Rhode Island. Pennsyh anian; Ten- 

 mile series; Allegheny or Conemaugh stage. 

 jrolofypc.—OA.i. No. 38076, U.S.N.M. 



ARCHIMYLACRIDS OF DOUBTFUL SYSTEMAllC^ POSI- 

 TION. 



NECYMYLACRIS LACOANA Scudder. 

 Neajmi^l(«yrls /(tcoaiin Scudder, Mem. Boston Scjc, III, 1879, p. 53, pi. v, fig. 12. 

 Locality. — Boston Mine, Pittston, Pennsylvania. Uppei- transition 

 group. 



This form may be regarded as type of the genus Necyniylacrin. 

 Holotype.—C2X. No. 38057, U.S.N.M. 



