794 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



DICHRONOBLATTA, new genus. 



I regard as typo of thi.s g-enu.s Scudder's (rt^rahlaftintr nuiiJiiui^ t\\o 

 neuration of wliich, according- to my \'iovv% has been (|iiito erroneously 

 interpreted. 



The genus is distinguished from its allies principally l)v the shorter 

 radius, which does not reach to the tip of the wing; by the more 

 copiousl}' divided media, which arises cpiite near the l)ase, and by the 

 structure of the cubitus, which, in aljout the middle of its course, 

 sends out a branch forward and occupies the entire posterior margin. 

 The form of the wing is elliptical, somewhat more than twice as long- 

 as broad. The anal area attains about two-lifths the length of the 

 wing and includes luimerous veins which end in the inner maiigin. 

 Traces of cross veins are preserved. Intercalary veins wanting. 



DICHRONOBLATTA MINIMA (Scudder). 



(jcrahlattiita iiiiiiniui Scuddek, Bull. V. S. (ieol. Surv., No. 124, 1895, pi. xi, 

 fig. 5. 



Locdllty. — Richmond, (3hio. Conemaugh formation; shales above 

 tae Ames limestone. 



NEAROBLATTA, new genus. 



Front wing subelliptical, 2^ times as long as Iji'oad. Radius arcuate, 

 reaching to the end of the front margin, with many oblique branches 

 extending forward. Media divided into '•1 principal ))ranches, whose 

 twigs take up the apical mai-gin and a part of the iiuier ))order. 

 Cubitus much reduced, with its few divisions occupying only the 

 middle portion of the posterior margin. Anal area large, limited by 

 a strongly curved fold, with numerous veins fusing in the inner 

 border. Distinct, delicate cross veins. No intercalary veins. 



Type of genus, NeanMatta pai'nila (CrokhMiberg). 



NEAROBLATTA ROTUNDATA (Scudder). 



NeorfhrohhiU'nui. rotundala Scudder, Proc. Acatl. Nat. Sci. Phila., 1885, p. 109; 

 Zittel's Handbuch, I, 1885, p. 766, fig. 960; Mem. Boston Soe., IV, 1890, 

 p. 467, pi. XLii, figs. 7, 8. 



Locality. — Fairplay, Colorado. Lowei- Permian. 



NEAROBLATTA LAKESII (Scudder). 



NeorthrohluttiDa laL-exii Sciddek, Proe. Acad. Nat. 8ci. Phila., 1885, p. 109; 

 Mem. Boston Soc, IV, 1890, p. 467, pi. xlii, figs. 9, 15. 



Locality. — Fairplay, Colorado. Lower Permian. 



EPHEBOBLATTA, new genus. 



Very similar to the preceding genus, but diflers in the shortened 

 radius, which ends far above the apex of the wing; in the strongly 



