764 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXIX. 



AMETROBLATTA STRIGOSA (Scudder). 



Etoblatt'ma strigosa Scudder, Proc. Boston vSoc, XXIV, 1889, p. 52; Bull. U. K. 

 (leol. Surv., No. 124, 1895, p. 72, pi. iv, fig. 10. 



Locdlity. — Richmond, Ohio. Conemaugh formation; shales above 



the Ames limestone. 



PAMETROBLATTA LONGINQUA (Scudder). 



Porohlatthut longinqua Scuddek, Bull. V. 8. Geol. 8urv., No. 124, 1895, p. 135, 

 pi. XI, fig. 12. 

 Zocalit}/.— Richmond, Ohio. Conemaugh formation; shales above 

 the Ames limestone. 



ATACTOBLATTA, ne^jv genus. 



Front wing remarkably slender, more than 3 times as long as broad, 

 with more strongly curved anterior margin and slightl}^ arcuate inner 

 border. Costal area band-shaped, but short, reaching but two-tifths 

 the length of the wing. The longitudinally extended radius, with its 

 6 forked offshoots branching off forward, tills up the entire anterior 

 margin. The gently vaulted media passes through the middle of the 

 wing and sends out posteriorly 3 long oblique branches toward the 

 apical margin. The long cubitus, with its about 9 mainlv forked 

 branches directed backward, takes up the largest part of the posterior 

 border. The veins are bordered, and in the edges traces of cross veins 

 are to be seen. The interspaces between radius, media, and cubitus 

 are very wide; consequently the radius approaches very close to the 

 subcosta. 



ATACTOBLATTA ANOMALA, new species. 



Locality. — Wills Creek, near Steubenville, Ohio, 

 mation; shales above the Ames limestone. 



Conemaugh for- 



Fig. 67.— ATACTOBLATTA ANO.MALA. 



The length of the wing amounts to about 22 mm. 

 Holotype.^C'At. No. 38698, U.S.N.M. 



DORYBLATTA, new genus. 



Front wing slender, lancet-shaped, 3 times as long as bi'oad, with 

 almost equally curved anterior and posterior margins. Costal area 

 attaining about half the length of the wing, band-shaped. Radius 



